How much RAM memory

  newman35 10:36 15 Feb 07
Locked

I have a computer which has a 512Mb RAM memory installed.
After reading a post I downloaded 'siw' and it says my RAM is 338Mb total, 127Mb free. Memory load 66%.
Can anyone explain this to me?

  oldbeefer2 11:21 15 Feb 07

Could this be the reason??

Common RAM Sizes
If I remember correctly the original SIMMs came in 256KB, 512KB and 1MB packages and cost a small fortune. In the days of Windows 95 a computer would commonly have several 4MB or 8MB memory modules. By the time Windows 98 came out these had become 16MB or 32MB modules to make up around 64MB in a good system. For Windows XP computers 128MB is a workable minimum depending on what applications you want to run, modules tend to be 128MB, 256MB or 512MB. Currently systems routinely ship with 512MB sticks and 1GB sticks are becoming more common.
RAM module sizes always double: 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB, 512MB, 1GB, 2GB, etc. (since strictly speaking 1GB = 1024MB) You wont find any 96MB RAM modules for example, but your system may have an "unusual" amount of total RAM for a couple of reasons

The system contains different sized RAM modules. For example your system shows 192MB of RAM. Most likely this was a system that started life with 64MB of SDRAM and was upgraded by adding a 128MB module.


The system has onboard video. When a system has onboard video the video 'card' is integrated into the motherboard, but no video memory is provided, instead the system reserves part of the system RAM to act as video memory. How much memory is reserved depends on settings in the BIOS and is usually any standard size from 4MB to 64MB. The 'total' amount of RAM that Windows sees is then the size of the RAM module, less the amount reserved for video. This can result in some very odd-looking amounts for total system RAM. For example a system's total RAM may be reported as 352MB. This could be made up of one 128MB module plus one 256MB module less 32MB reserved for video.

  Totally-braindead 13:41 15 Feb 07

Its onboard graphics and that where the memory has gone, to power the onboard graphics.

  newman35 14:02 15 Feb 07

Thanks, my computer is new (maxdata Favorit 3000) and it's going OK - I was just curious about the 'missing' RAM.
Will the amount used by the graphics affect other operations, and should I consider putting an extra 512Mb memory into it? Not expensive at about £25, but what benefits might I get?
Sorry if these questions are basic!

  keef66 14:26 15 Feb 07

I increased ram from 512mb to 1 GB, and memory intensive things like games load quicker, and photoshop saves images quicker, but no obvious benefit elsewhere.

  newman35 15:04 15 Feb 07

Thanks keef66, I hope to start doing some home video editing, and no doubt this will need 'extra', so it might be as well to upgrade the RAM, I suppose?

  Totally-braindead 15:06 15 Feb 07

Video editing is memory as well as processor intensive so yes it is a good move.
Do be sure you buy the correct memory, £25 seems a bit cheap. I always use Crucial RAM.

  newman35 15:54 15 Feb 07

Yes, I did check Crucial and let it decide which memory I needed and it's £27 incl vat & postage.
512Mb DDR PC2700 184pin DIM ( ebuyer are roughly same for Kingston, I think). Prefer Crucial, as you say.

  Totally-braindead 16:22 15 Feb 07

Thats a good price, prices must have dropped since last I used them.

  Totally-braindead 16:46 15 Feb 07

Prices have dropped. Same memory as I bought about a year ago is now £30 cheaper. Figures.

  newman35 17:47 15 Feb 07

Thanks to all who helped me with this, will click 'resolved' now.

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