What Causes Physical Memory Dump?

I am sure you freak out when you computer screen suddenly turns blue and you see the error message that says "beginning of physical memory dump".

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What do you do? Most people would just reboot the computer and pretend nothing happens. Some people want to know what happened and what they should do to fix it. It can be very daunting and stressful when you get the blue screen of death while doing important work. You would not have time to save it because it happens suddenly without any warnings. You must do the work all over again after rebooting.

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What actually cause the physical memory dump?
DLL error RAM Hardware Problems Memory allocation error COM error HIVE crash

What should you do when it happens?

If it occurs because of your memory problem, then you should consider buying a new computer.

The ignorant way is doing a reboot and hoping that it does not happen again. The hard way is to address what caused the error and fix it manually. If it occurs because of your chaotic registry, you could find and fix it, which is very dangerous because one simple mistake can lead to a total error in your system. Reinstall your operation system might be a wiser decision to make.

The easy way is to pay a computer technician hundred of dollars to fix it for you. But in fact you could do what the technician would do to fix your computer; the wise way is to be a computer technician yourself. Did I said that you could actually do what a computer technician would do to fix your computer? Yes, it is very simple really. A technician uses a simple software to fix your registry.

If you could be the technician yourself and pay less to get the software that you can use forever, why should you pay a technician hundreds of dollars to fix it only one time for you?

You will want to do regular maintenance to keep your PC error-free so that this problem never re-occurs again.

What Causes Physical Memory Dump?

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Different Types Of Pointing Devices

Devices of a desktop computer can be classified into two categories - input devices and output devices. Both of them together build a relationship between a computer and the external world. Input devices are the part of the hardware mechanism of the computer that changes information to make it acceptable by the computer. However, this information is completely under the user control that uses them to give commands or concepts that has to be processed by the computer.

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There are different types of input devices. We have classified them according to the duration of the time period. Earlier, there were only different types of keyboards that are included in the category of input devices of computer. Like there are computer keyboards, chorded keyboard and keyer in the category of input devices only. But later on, with technological advancement, pointing devices were developed and got added in the types of input devices.

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A pointing device is a hardware device that makes it possible for the user to install constant and multi-dimensional information in the system. The three main functions of the pointing devices are - to point somewhere on the monitor, click and drag. Motion of the pointing device on the table is followed by the movements on the screen. The most common pointing device about which everybody knows is the mouse. However, there are some other pointing devices as well and now, we will discuss about them.

Track ball is a pointing device that is mounted in the shape of ball in between the two mounts of the mouse. When the user rolls the track ball, the information on the monitor starts rolling either in the downward direction or in the upward direction. Another pointing device is the touch pad. It is generally used in the laptops. They are in the shape of a flat pad where rubbing finger leads to movement of cursor on the screen.

Space ball is used for the 3-D computer designs and is used by graphic professionals. Touch screen is also a pointing device which acts as a display and the device at a same time. User just needs to point over the screen of the computer to give it the desired directions. A light pen is also a pointing device. It is light sensitive device and is used to point out the displayed things on the computer.

Joysticks are the hand held devices that are used to handle video games on computer in the best way while pointing stick is used to touch the monitor for the computer for giving it commands and directions. And the last pointing device that is used quite commonly is the wired glove. By using the wired glove device, the wearer can give the directions to the computer by bending his fingers.

So, these were some of the pointing devices for the desktop as well as the laptop computers. More than half of them are used in our day to day lives while others are used for official professional purposes only.

Different Types Of Pointing Devices

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How To Do Your Own Computer or Laptop Memory Upgrade

Upgrading the memory in your computer or laptop is one of the
easiest and most cost-effective ways of improving your computer's
performance. Still many computer owners shy away from any memory
upgrade for a number of reasons: lack of knowledge, warranty issues,
fear of ruining their computers, compatibility concerns, or just an
innate feeling that the inside of their computer is just some alien
territory they must never venture.

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Like a lot of things in life, a computer memory upgrade seems
more complicated than it actually is. Most of the apprehension
comes from a lack of knowledge. Let's face it, the average computer
user may only have a vague idea about RAM, Motherboards, Graphics
Cards and the like.

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They know their computer works when they turn it on and that's all
that really matters to them. However, what most people don't realize is
that with a little investment of time and a few dollars, they can make
their computer work better and faster. It's an investment that will
quickly pay for itself; not only will you save time when doing your
daily computer chores, but the overall enjoyment of your computer or
laptop will greatly increase.

It's best to tackle this problem or task with some good information
concerning all the factors involved in the upgrading of your computer's
memory. Let's start with the basics and work from there.

Get Out Of Jail Free Card!

(*Shortcut! Don't have the time or desire to read all the 'ins and
outs' of a RAM or memory upgrade but still want to upgrade your
system. Go to the author's resource box below and click the link.
It will take you to a page where you can find a Memory Advisor tool
which can scan your system and tell you which memory upgrades are
possible with your particular computer or laptop.)

First Step: Know Your RAM

RAM or random access memory. This is what the computer uses to run
applications and data on your computer. You need it to run your
computer's OS operating system, your need it for handling graphics,
files, web-browsing, e-mail and multi-tasking. RAM is vital to the
operation of your computer. As a general rule, the higher the amount
of RAM you have, the faster your computer will work or run.

To complicate things somewhat, there are many types of RAM. The type
of RAM in your computer or laptop may depend on the year it was
made.

From mid-2004 a lot of the computers have DDR2 (double data rate,
second generation) SDRAM (Synchronous Dynamic RAM). Before that time
many computers had DDR (double data rate, first generation) SDRAM.
Most older systems use SDR (single data rate) SDRAM, fast page mode
(FPM), or extended data out (EDO).

To complicate things even further, most of the types of RAM comes
in different speeds!

DDR2 SDRAM is a new standard that can boost conventional SDRAM
memory up to speeds well over 200MHz and beyond. For example, the
new IBM ThinkPad T43, thanks to the Sonoma Chipset or platform has
533MHz DDR 2 SDRAM.

This is much better than standard SDRAM which tops out around 150-166MHz
and DDR SDRAM which starts at 200MHz and goes up to around 400MHz.

Keep in mind, DRAM means Dynamic Random Access Memory and SDRAM means
Synchronous Dynamic RAM.

And to really confuse you, having a faster RAM speed does not (by itself)
make your computer go faster, you must upgrade or increase the AMOUNT of
RAM in your computer system to increase performance. Also keep in mind
your computer was made to accept a specific memory speed and there's no
benefit from going beyond that limit.

It's usually recommended that you get the fastest speeds for your
system, this will permit for better compatibility and make it easier
for future upgrades.

Second Step: Know Your Machine

Without a doubt, compatibility is the most important factor in
buying a memory upgrade for your laptop or computer. It's essential
that any upgrade be compatible with your computer or machine, i.e.
otherwise it just won't work.

Therefore, you have to know the amount and kind of RAM you have
in your computer or laptop. The best way to find this is to check
your owner's manual. It should tell you the type of RAM your system
is using, it should also tell you the maximum amount of RAM your
system can take.

Obviously, an easy way to make sure you don't exceed the maximum
memory on your computer, just subtract your current memory from
the allowed limit listed in your system specifications. For instance,
if your computer takes a maximum of 512MB of RAM and you have 256MB
installed, then you can upgrade to an additional 256MB of RAM
(512MB - 256MB = 256MB).

You should also be aware that DDR is not backward/forward-compatible,
which means that if you're upgrading a computer that doesn't have
DDR technology, it won't take a DDR upgrade.

Likewise, DDR2 is not backward-compatible, which means if your system
doesn't have DDR2 technology, it won't accept a DDR2 upgrade.

So check your system very carefully and see what kind of RAM it has and
the maximum amount of RAM it will take. You must also check to see if
your computer's warranty will be null and void if you install the RAM
yourself! Some manufacturers actually seal your computer case and you
must have an authorized technician to install your RAM.

Third Step: How Much RAM Do You Need?

It's generally agreed that you need at least 256MB for Windows XP and
Mac OS X. You will only need 128MB for other operating systems in Windows
or Mac. Most general office work and heavy multi-tasking may need 512MB of
RAM. Gamers or Professional Graphic workers usually need the most RAM -
up to 2GB or more of RAM.

Please note, installing a faster speed RAM (as noted earlier) will not
increase the speed of your computer or laptop. The only way to increase
the speed of your computer is to increase the AMOUNT of RAM you have
in your system. Going from 256MB of RAM to 512MB of RAM will speed up
your computer. Going to 2GB of RAM will make it go even faster. Benchmark
testing has shown that you can get from 28% up to 43% increase in
performance, depending on the amount of RAM increase.

However, there's always a spoiler, other parts of your computer must be
able to handle this increase. Your computer will only go as fast as your
slowest link. In other words, you may have to upgrade other elements in
your computer to receive the benefits of a memory upgrade. Make sure you
check this factor first before your make your memory upgrade. Otherwise,
you may just be wasting your time and money.

Another consideration is the Memory of your Video or Graphics Card
in your system. The amount of VRAM is the major factor in your display's
resolution and color depth. A faster and more powerful upgrade in your
Graphics Card will give you increased performance especially for handling
graphics and videos, as in 3D Gaming.

Fourth Step; Ordering Your RAM

There are over 110,000 different memory upgrades you can choose from!

There are many places to order your RAM, from your local computer store
to online sites. If you're ordering online, one the most highly rated
sites is Crucial.com - these people are memory experts and know their
memory! They are a part of Micron, one of the largest DRAM makers
in the world.

Perhaps, what's more important, Crucial has very high consumer
satisfaction ratings from other third party rating sites. This gives
you an unbiased recommendation or indication that the service and
product is top-notch. Even more important, they have the
Crucial Memory Advisor(TM) tool which will scan your computer system
and tell you what memory upgrades are available. They also back
up their products with a lifetime warranty.

Some other thing to keep in mind when ordering your RAM. Many desktop
systems or computers use what's called "non-parity" memory which
means it does not need ECC (error correction code) or "parity"
modules.

Registered, buffered, and unbuffered are other terms that
will come up -- they refer to how a certain memory module
processes signals. Usually, most PC systems take unbuffered
RAM and rely on the motherboard controller to help process
memory. Registered RAM is used mostly in servers.

Fifth Step: Installing Your New Memory or RAM

If you order your RAM online, you will receive your RAM module in
an anti-static bag, along with detailed instructions on how to install
your RAM. On modern system boards, RAM is installed on SIMM or DIMM
modules (SODIMM in notebooks).

One of the most important things to do when installing RAM or working
with your Computer is to 'Ground Yourself' to make sure you
don't 'Shock' your computer with static electricity. You can take
some simple precautions to prevent this from happening. If you have
wrist straps designed to prevent shocks, you need to wear them.

If you don't have wrist straps, here's a simple way to
ground yourself:

You should turn off your computer, monitor, plus all accessories
(speakers, printer, scanner). Unplug your computer and any
accessories. Then quickly touch an unpainted part of your computer
case and keep your feet planted in one position while installing
your RAM. If you walk around, repeat the process above before you
touch any internal parts of your laptop or computer.

Open up the back of your computer or laptop. Depending on your model,
you may need a screwdriver. If you have a laptop or notebook, the memory
slots are sometimes located under the keyboards. Most times, it's in the
back of your laptop; check your manual for the location of your laptop's
memory.

Depending on your upgrade, you may have to replace your RAM module with
the New one, in other cases, you will be adding any extra module or
two. Follow the specific directions that come with your RAM upgrade; installing the RAM is only a matter of a Push and a snap! Your RAM
upgrade will snap into their memory slots without too much difficulty.

Before you close the case, turn your computer or laptop on to see if
your new RAM is installed. You will see it on the startup screens or
you can easily check it by going into 'My Computer' under properties, if you're using Windows.

Basically, this is how to do your own computer or laptop memory
upgrade. There may be other elements or aspects you might want
to check out before installing your new RAM but follow the guidelines
above and the detailed instructions that come with your RAM module or
modules and you should be OK.

If you have any trouble, click the link in the resource box below. They
have extensive detailed guides that you can follow. If may be a good
idea to check out these guides first, before you order your memory, to
see the kind of procedure you will have to do to install your RAM.
Realizing how simple this procedure is may relieve some of your initial
fears concerning a memory upgrade for your system.

This site also has 'live' help where you can chat to Expert Memory
Technicians if you are still having problems.

How To Do Your Own Computer or Laptop Memory Upgrade

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How To Connect Cell Phone To PC?

These days, people are getting ever more reliant on technology. This is particularly true of communications technology. I remember the days when I had never even seen a cell phone. Today I consider it a gross dereliction of duty to step out of my front door without being completely 100% contactable for every minute of every day.

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This state of affairs is not just true for business people, it is not even limited to adults, and increasingly kids are keeping in contact with their parents, their coach, their friends and their piano teacher by cell phone, usually to explain why they will be late for an appointment it seems.

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However, regardless of the fact that this communications revolution involves everyone, there are certain people in certain industries that are far more reliant on communications technology then the rest of us. For these people it is crucial that they can get online, read their emails, and do a host of other tasks that require internet access.

Their life has been made a lot easier by certain new technologies such as hotspots and blue tooth. With these new services, you can walk into virtually any coffee shop or airport lobby in the world, open up your laptop and you will immediately be online. This is a truly amazing advance on the connectivity that people could previously achieve and has removed a lot of the need for things such as internet kiosks and phone booths.

However, there will be times when you simply cannot get to a star bucks. Difficult as it is to believe, there are still places in the world where you can be stuck without instant internet access and this can be a serious problem for some people in tight situations. Examples of this could include when you are on a train or in a car, when you are broken down at the side of the road, when you are in a small town far from major cities etc. In any of these circumstances, you may need to get online fast but don't know how.

Well, the solution is to revert to something that many people did in the past but stopped when the technology moved on. That is connecting your laptop to your laptop and using that to get online. All you need is a cell phone that supports data transmission, which today includes virtually all phones, and a blue tooth, infra red or data cable connection between your phone and your pc. What are you waiting for? Give it a shot!

How To Connect Cell Phone To PC?

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Acer Aspire 5542g Review

The Acer 5542G is the company's replacement model for it's very popular 5536/5536G series. The new model comes with an improved processor and a whole new Tigris platform. It was after more than a week's wait and phone calls that I got hold of one Acer Aspire 5542G. From the moment I read the specification sheet, I have been very thrilled to get the machine in my hands. The specs boasts about a AMD Turion II 2.2 Ghz, 3GB DDR2 Memory, ATI 4570 Dedicated graphics card with a 512MB DDR3 memory and a quite generous 320GB Hard disk drive for a price tag of less than RS 34000, which is quite a tempting deal.

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In this detailed review we will see how these specs meet the real performance needs.

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Key features:

In this section, we will look in detail at the key components that makes up this laptop. I will also try to include as much specifications and details as available from the manufacturer's source.

Processor:

Acer Aspire 5542G comes with the second generation AMD Turion Processor (AMD Turion II M500) clocked at 2.2Ghz which houses a 1MB L2 Cache. The Turion II M500 is fabricated using the 45nm technology. It belongs to the Caspian generation of processors and supports HyperTransport 3.0 and hardware virtualization.

The Turion is AMDs answer to mobile processors, which provides excellent performance while keeping the power consumption at the minimum. The Turion processors generates less heat compared to AMD's desktop work horses that have a bad reputation in heat emission department. The Turion II being the next version of the decent performer Turion, it sets high expectations in terms of competing with the Core 2 Duos in the market. We will see how it scores in real performance when we benchmark it down the road.

Graphics Card: ATI Mobility Radeon HD 4570 512MB DDR3

One of the main attractions of this laptop is the graphics engine that lies beneath the hood. The Acer 5542G comes with a dedicated ATI Mobility Radeon HD 4570 with 512 MB of DDR3 memory.

For those of you who are not clear about the difference between an integrated and a dedicated graphics solution, I'm adding a few words. An Integrated graphics solution (eg: the Intel's X4500) doesn't come with dedicated video memory; it eats up your system memory for graphics processing and thus the slower path between the system memory and the graphics engine causes the biggest bottle-neck when it comes to performance. Also the integrated graphics processor would be less powerful than a mainstream dedicated one in raw processing power. On the other hand, a dedicated graphics card will usually have a high speed dedicated video memory (eg: DDR3) which is coupled to the graphics processor. This removes the bottle neck and gives the card superior performance. The graphics processor on a dedicated card would usually support high-end effects provided by the latest DirectX and OpenGL APIs which gives the realism and visual-candy in the latest games.

The HD 4570 is a faster clocked version of the Mobility Radeon 4530/4330. It has a 64 Bit memory bus and comes with a 512MB DDR3 VRAM. The 512MB should be adequate for most gaming and graphics needs, unless you play in the craziest resolutions. (As rendering resolution increases, the more memory it needs). The DDR3 memory will meet the needs for the fastest and huge volume texture processing that modern games demand. However the 64 bit bus stands inferior to the 128 bit bus that most mainstream cards offer.

The ATI Mobility Radeon 4570 is based on the RV710 chip and it provides 80 stream processors. The Mobility Radeon also provides the video technology called Avivo HD that provides an on board 7.1 sound chip. The graphics solution also features a 2nd generation Unified Video Decoder that supports full bitstream decoding of H.264/MPEG-4 AVC and VC-1 streams. The 4570 graphics unit is capable of handling all video tasks including HD video decoding.

Display:

The Acer 5542G comes with a 15.6" High Definition LED backlit TFT LCD display that provides 220-nit high brightness and Acer's Cinecrystal display technology. The pure widescreen (16:9) display supports a maximum resolution of 1366X768 and provides a 60% color gamut. It has a high-def response time of 8ms.

Memory: There is nothing much to boast about a 3GB DDR2 800Mhz memory that comes with the Acer Aspire 5542G when compared to the current line of laptops many of which sports a 4GB under the hood. The 3GB is sufficient for most of the computing needs which can later be upgraded to 4GB. However the 3GB deal would appear reasonable when we keep the price tag of the Acer 5542G in mind.

Hard Disk Drive: Again there's nothing jaw dropping in this department. But I would say that the 320GB that comes with the Acer 5542G is generous for most of your storage needs.

Processor performance and benchmark:

I was initially reluctant to switch from the Intel's proven workhorse Core 2 Duo to the AMD's Turion family of processors. It is a widely accepted fact that the Intel's processor outperforms the AMD counter part, provided that both runs on the same clock speed; the main culprit being the lower L2 cache in AMDs. But my reluctance to move on to the AMD Turion II was swept away by the performance benchmarks. The AMD Turion II M500 2.2 Ghz outperforms the Intel Core 2 Duo 6670 2.2 Ghz. When AMD Turion II M500 scores a decent score of 1426, the Intel Core2 Duo 6670 managed to get only 1379, though the margin is not huge.

The Turion II M500 also scored higher in the Windows 7 performance rating with a score of 5.7 against the score of 5.5 of the Intel's Core 2 Duo 6600.

The Turion II without doubt has improved it's architecture dramatically compared to the previous generation Turion, which helps it to achieve a higher performance benchmark, while competing head-on with the Intel's counterpart, even though AMD Turion II M500 houses only 1MB L2 cache compared to the 2MB offered by the Intel's variants.

The AMD Turion II M500 is doubtlessly an excellent performer and is commendable for being the first AMD processor model overtaking the Intel Core 2 Duo along the performance lines, both of which are clocked at the same speed. Though the Turion II has only 1MB L2 Cache it brings excellent performance and computing power on a budget. The Turion II M500 processor gives the Acer 5542G with great number crunching efficiency, that was much noticeable when we ran tests involving compressing/extracting, Gaming and Video rendering using 3D graphics tools. The Acer 5542G showed brisk performance during daily computing, and the Windows responsiveness and multi-tasking were significantly quick.

Graphics card performance:

The Acer 5542G with the ATI Mobility Radeon 4570 with 512MB Dedicated DDR3 VRAM is not an exceptional performer in terms of the latest gaming standards. But very few laptops comes with a high end graphics card that meets the high-end gamer's needs and those machines will burn a hole in your wallet for sure. The HD 4570 in the Acer 5542G is a decent graphics card to play a little older game titles in full detail whereas when it comes to the most recent games, you might have to tweak the detail level to a medium to get reasonable frame rates.

The Acer 5542G is an excellent choice for gamer's on a budget as well as 3D Graphics designers and Animators.

I found the Acer 5542G delivering very smooth frame rates on Test Drive Unlimited even at the highest settings, though a video review of the Dell Studio 15 housing the same graphics card showed significantly lower frame rates in YouTube. May be the performance boost is due to the DDR3 Video Memory as well as the better number-crunching done by the AMD Turion II M500. The card fared really well in older titles like Need For Speed Most Wanted, Need For Speed UnderCover, Unreal Tournament 2003, and Crysis Warhead even at the highest detail settings with 1024X768 resolution and FSAA turned on. The Acer 5542G also delivered consistently playable frame rates in Microsoft Flight Simulator which is a quite resource hungry game, due to the presence of huge textures and extensive terrain.

Display performance:

The 220-nit high brightness display of the Acer 5542G, gives excellent display quality with good sharpness and contrast. It also delivers very good and accurate color reproduction (60% gamut). The viewability from sides is not exceptional, but is adequate. The only major disadvantage of the display is that it's high glossy finish attracts glare. Hence it is not suitable while viewing against any direct light source.

Audio Performance:

The Acer 5542G sports a Dolby certified audio system. The Realtek chip provides 32bit audio decoding and provides SP-DIF and Dolby Digital output. It also supports Dolby Headphone and Dolby Virtual Surround modes. It means you will be in audio bliss, if you connect the Acer 5542G to a nice home theatre or high-end headphones.

The built-in speakers of the Acer 5542G clearly lacks the bass and was a disappointment during our tests. The sound clearly lacks the thump element in it. It doesn't mean that the speakers are worthless. The speakers give you very nice high and medium range frequencies quite well. The audio volume levels were loud enough and will be adequate if you are not in the middle of a very noisy environment.

Battery:

The Acer 5542G comes with a 6-cell battery pack. It would probably disappoint you, if you are looking for a laptop with 3+ hours battery backup. The lower battery backup can be attributed to the modestly big 15.6" display paired with the dedicated graphics card that can drain out quite a lot of battery power. With the screen brightness at low, I was able to obtain a 2 hours 50 minutes backup with no audio, video or games turned on. At highest performance setting, you can expect roughly two hours of battery backup.

Heating:

Being an AMD based laptop most of us who have used an AMD based sytem would have concerns about over-heating. Stay cool. The Acer 5542G handles heat well. When you use it for extended hours for your daily computing needs, it doesn't generate any significant heat. I found the heat near the palm rest regions less compared to some other Intel based competing laptop models. The Acer 5542G has adequate ventilation at the bottom and has a vent at the back, that blows the hot air out. The fan steps into high speed the instant things start getting hot.

It doesn't mean that the Acer 5542G won't generate heat at all. The moment you start playing games, the rosy picture changes. Though the Acer 5542G's body remained just warm, the vent at the rear end was blowing out really hot air, which obviously means heavy heat generation, though it gets displaced well. Though the Acer 5542G gets away with the heat quite well, it would be a good choice to get an efficient laptop cooling pad if you are into serious gaming.

Other components:

The Acer 5542G comes with a good DVD Writer, Bluetooth, Wireless LAN etc. These devices performs quite well and doesn't seem to have any specific points worth mentioning.

Accessories:

The laptop comes with a nice backpack from Targus with Acer logo on it. The backpack has adequate space to carry some extra stuff in it while you are on the move. It's build quality is good and provides adequate cushioning for the laptop compartment.

Conclusion:

Acer 5542G is a laptop that brings great value to those on a budget, who need excellent processing and graphics performance. I highly recommend it for all gaming enthusiasts and graphics designers, owing to the excellent performance of the processor and the graphics solution built-in. It's powerful processor can meet most of the extreme computing needs unless your needs target the ultra-high-end like an i7. The Acer 5542G equipped with it's Turion II processor competes really well with the Core2 Duos out there; no need for the 'Will AMD perform equally well?' question anymore. It delivers brutal processing power.

If you are an audiophile who would play music through the laptop's built-in speakers round the clock, Acer 5542G may not be the best suit for you. If that is not a top-priority for you or if you have a nice home theatre/headphone, then the Acer 5542G gives you great joy in the audio department too, through it's Dolby processing and digital outputs. It all depends on your needs.

The battery suits the home computing / gaming / designing needs. It's 2+ hours backup can handle your presentation, on-the-go needs too, though a 3+ hours backup would have been more recommendable.

The laptop model I purchased comes loaded with Linpus linux operating system (command prompt only) and eliminates the Windows dependency, which helps the Acer 5542G keep its price down. You might also get a version with Windows pre-loaded but for a higher price tag.

Pros:

Excellent processor

Excellent graphics for designers and budget gamers

Good Looks

Quite sturdy design

Good Audio processing and digital out

HDMI

Cons:

Built-in speakers do not match the good audio processing and lacks bass completely

Glossy screen difficult to work with in direct light

Volume control keys could have been softer to touch

Arrow keys needs refinement

Pricing and final words:

This laptop is available in India in many online shopping websites at a sub RS 35k price tag. I got hold of one for RS 33700/- (approximately 717 USD) through a local dealer. With such reasonable price tag and compelling set of features, I strongly recommend the Acer 5542G.

Acer Aspire 5542g Review

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Flat Screen Television Plasma Versus LCD TV Screen Review

If you're looking to buy a flat-screen television, you probably have already asked yourself which is better, Plasma or LCD. We shall attempt to shed some light on this subject for you.

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Nuts and Bolts - The technology of LCD and Plasma Systems

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While both Liquid Crystal Display (LCD) and Plasma panels look similar there is a fundamental difference in the way they work. Both use precise electrical charges to control a matrix of cells to produce a picture. However, in the case of plasma screens the cell contains plasma gas while the LCD cell is a fine layer of liquid crystal held between two layers of glass. This fundamental difference produces differing results which have advantages and disadvantages depending on their application. So let's try and find out which system is best for your needs.

Picture This - Comparing Image Quality

If this article was about Flat Screens verses Cathode Ray Tube (CRT) TV sets there would be no contest. Both Plasma and LCD screens produce far superior and accurate images than the older CRT technology can hope to - with a greatly reduced footprint. But here we are interested in the the relative merits of flat screens. There used to be an easy quality distinction to make between LCD and plasma screens based on the amount of light each system produces from its cells. Plasma used to have the advantage of producing a brighter image due to the inherent property of its cells to produce their own light. In order to produce a visible image LCD cells have to be lit from behind - traditionally by fluorescent tubes. This has the disadvantage that even black cells have a little light bleeding through them which reduces contrast. However, backlight technology for LCD has improved significantly in recent years with the introduction of LED banks replacing the older fluorescent tube system. The result is that there is negligible difference in the quality of blacks between the two systems - although purists will still tell you that Plasma rules this roost.

Cooking with Gas - The advantages of Plasma

We have covered the advantage of better contrast control with Plasma's ability to produce blacks that are deeper and more true. Another advantage of gas over crystal is that it reacts to electrical stimuli faster. In ordinary terms this means that it can turn on and off faster. This speed advantage reduces the blurring effect that some flat screens produce when displaying fast moving images. As with the backlight technology issue, advances in LCD technology has reduced the millisecond response gap between Plasma and LCD cells to such a minimal level so as to be almost indistinguishable. Of course our purist friends will continue to argue the toss and will be more than happy to produce millisecond response charts to prove their point. For us mere mortals the difference would be hard to find with the naked eye.

Plasma enthusiasts are quick to point out that their preferred system has a better image fidelity at wider viewing angles. We've all seen the effect on flat screen pictures as we move farther to the side of the panel. The brightness and contrast begin to significantly deteriorate and eventually we experience what some describe as a 'solarising effect' where the darker end of the image spectrum inverts and all sorts of weird effects are produced. Historically this was always more problematic in LCD systems with plasma being able to produce a far more true image at far greater angles. But, we are going to have to say it again; advances in LCD technology...well, you know the rest.

Crystal Clear - The Advantages of LCD

The major advantage of LCD over plasma is that the system is far more compact and individual cells can be faithfully reproduced at smaller sizes. Another advantage is that LCD screens can make use of plastic where Plasma uses glass. What does this mean? It means that you can get more pixels into a smaller screen size, which means better resolution the amount of space you have. It also means that the units are less bulky, lighter and produce smaller footprints. Need to save space? Need a TV for your caravan? Buy LCD.

Fans of LCD will be more than happy to point out that Plasma screens experience something called 'screen burn-in', something unassociated with LCD screens. This phenomenon is caused when a single image is left on screen for a long period which burns a 'ghost' of that image into the plasma cells. In the past this became such an issue on computer monitors that it gave rise the 'screensaver', which is now more a novelty than a system for actually saving your screen from burn-in. Plasma had made huge advances in reducing this effect, it is now hardly an issue worth worrying about.

Are you an eco-warrior? Do you check that every appliance is turned off at night? Then LCD may be for you. LCD screens consume far less power than their Plasma cousins and produce less heat. LCD screens also have a longer life span lasting up to three times the number of hours it takes to loose half their brightness than Plasma screens. This not only gives Liquid Crystal the moral high ground in the green debate but also makes LCD screens more economical to run with less power demands and longer periods between renewals.

Pocket the difference - What about cost?

Plasma has an increasing cost advantage as the screen size gets bigger, so much so that the price of LCDs beyond the 50 inch mark become almost ludicrous. This is why plasma has become synonymous with large screen entertainment. At the small screen end of the market it becomes a much harder fight with LCD units producing good economic results especially when taking into account their longer lifespan and reduce energy consumption.

Skip to the end - Which is best for me?

If you are turning your front room into your own sports bar and fill you wall with premiership footy or perhaps you're trying to recreate the golden age of cinema; then plasma is probably for you. Unless you are seriously loaded LCD is simply far to costly for screens over 50 inches to be viable for most pockets.

If you are after something sleek, elegant and compact to compliment your minimalist living arrangements or just need to conserve space on your narrow boat then LCD is more likely to suit your needs. And, you can say you're saving the planet at the same time.

Another consideration is light. Do you live in a dark dungeon with only candles to light your way or do you live in a glass solarium surrounded by blinding sunlight? The argument over which platform performs best in strong light goes back and forth with each new generation of screen and each new technological advance. Plasma used to have an edge in the light until LCD produced LED backlighting. There was also the issue of Plasma screens being glass as opposed to LCD plastics so you'd have to worry about the position of possible ref elections but then Pioneer brought out their non-reflective Kuro plasma range and we are back where we started. The answer is that it is much of a muchness, but if you have the opportunity to test and compare the two systems in a similar environment to your chosen location then take advantage of this and decide for yourself which best suits your environment.

Finally there is the HD issue. At the moment there is little HD content available to take advantage of LCDs dominance in the resolution stakes but 1080p will eventually become the standard signal resolution. If it were the case now then we would recommend LCD for its native ability to apply pixel for pixel resolutions at lower cost. However plasma manufacturers are producing ever higher resolution screens at ever smaller sizes and will be able to produce screens that don't require 'scalers' to watch HD. By the time HD becomes the norm, we predict there will be little to choose between the two platforms in this regard.

If you're a dedicated techie and simply have to know that you are seeing every pixel, get the LCD. If you don't mind a bit of scaling but just want your picture really big stick with the plasma.

Flat Screen Television Plasma Versus LCD TV Screen Review

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