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A computer motherboard.

A computer runs on two major types of memory: RAM and memory in the hard drive .The two are necessary to basic computer functions. RAM is short-term, temporarymemory, while hard drive memory is long-term and can be permanent.

A hard drive is the storage capacity of the computer, or the long-term memory, and it issometimes also called "disk space." The storage capacity is usually measured ingigabytes (GB) and is the place where files are saved when a user presses the "save"button on most applications. Inside of the hard drive is a metal disk that spins while ahead writes the information onto it.

RAM is sometimes called "memory" for short which further complicates the issue. It is acomputer chip that contributes to the speed of the computer, and it is typicallymeasured in megabytes (M B) or gigabytes (GB), depending on the size of the chip. Whena user chooses to open a fil e, t he computer must put that information somewhere to beable to acc ess it. It writes the file temporarily to the RAM for easy access, and this type

of memory also temporarily saves files that are currently being worked on.Suggest Edits

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A major difference between RAM and memory on the hard drive is its permanence. Filesstore d in RAM are sent to the chip by little electrical charges that are necessary to keepthe files intact. If the computer is turned off or crashes, the electrical charges stop andthe files are lost. Hard drive memory is written onto the disk when a program is "saved,"so these files are not lost in the case of a crash or power loss. Computer uses shouldsave their work as it is being written, since every time this is done, the file is rewrittenin its new form onto the hard disk .

Another major difference between these types of memory is that RAM can be often beupgraded. Computers have ports on the motherboard to plug RAM chips into, and inmany cases, these chips can be easily removed and new ones plugged in. If a user has32 MB of RAM in her computer divided between two chips, then she has two 16 MBchips. If she purchases two 64 MB chips instead, they can replace the old ones and giveher 128 MB of RAM. This small and simple upgrade is relatively inexpensive and canmake a huge difference in the speed and performance of a computer, although

computers typically can only use certain types of RAM in specific amounts orconfigurations.

Computer owners typically want to know if they have enough RAM and memory to run aparticular program. RAM will be significantly less in numbers than hard drive memoryand is typically 128 MB - 1 GB. Since hard drive memory needs the capacity to holdsignificantly more files, the average capacities range from 1 - 400 GB. Individualprograms will list the required RAM and disk space necessary for them to run effectively.

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anon311245Post 5

Ana1234

A stick of DDR-RAM, a type of memory.

A RAM card.

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I'm looking to take out 1Gb of RAM from emachine D5039 and puttingit into an emachines t5010. Even though all the specs are the samefor the two different replacement cards, Crucial gave different partnumbers for different cards to replace originals. Are theyinterchangeable?

@pleonasm - I try to make sure the computer has the RAM I need
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w en uy it a t oug t ere s no nee to pay an extra arm an eg toget too much RAM... some people go overboard for a computer theyare only going to use for word processing). I am capable of installingRAM on a desktop but laptops are another story and I mostly uselaptops these days.

Sometimes they aren't too difficult to install, but usually if you evenopen the case you void the warranty and I'd rather keep that intact. Sodo bear that in mind if you think you can just install extra RAM lateron. That cheap upgrade of RAM memory could end up beingexpensive if you need repairs done in the future.

@anon74158 - I bet you wrote that comment only a few years ago(possibly even more recently than that!) but it already seems likequite a small amount of RAM to me. I don't think I'd consider gettinga computer now that had less than 2GB of RAM, or at least the optionto get more RAM for a reasonable price.

It's funny how quickly the computer world changes. But, I guess backwhen they didn't have as much RAM they probably also usedprograms that didn't require as much RAM. If you tried to use anaverage computer game being published today on a computer from adecade ago, it would take forever, if it worked at all.

Thank you so much. I just upgraded from 128MB ram to 512MB. Ihave Win XP and Windows 98.

Thank you for the articles on RAM and Ghz. They were very helpful tome as I try to buy a new computer!
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