RAM query

  Desert Andy 21:45 20 Nov 2007

I have an ASUS P5W DH Deluxe motherboard, I had 2 GB memory installed, and the system showed 2GB on start up. I have istalled a further 2 GB of memory, however only 2688MB is showed as available and 1408 MB as appropriated. I am using Windows Vista Home Premium. Can anyone explain why i don't have 4GB memory available please.

  Crash 22:19 20 Nov 2007

If its 32bit only 3.5GB can be used by the system. How much ram does it have in the bios?

  mikeben121 22:19 20 Nov 2007

32 bit operating systems can only support 2.5GB memory or so.

Are you using a 32 bit ot 64 bit operating system?

  DieSse 22:20 20 Nov 2007

Appropriated?? - You mean the full amount doesn't show up where exactly?

Some motherboards cannot detect or use maximum installable RAM. I can't find the reference right away, I'll keep looking.

  DieSse 22:29 20 Nov 2007

See your motherboard user manual page 2-15

click here to download the user manual if you don't have one. (note 6.2MB pdf)

  paul€ 22:31 20 Nov 2007

Do you have two graphics cards running on a 32bit system?

If you do then windows can just see 4Gb of ram in a 32bit system. It will then deduct the ram used in the graphics cards and if you use two cards then it will affect 2 sticks of ram.

click here Crucial tells you that the motherboard may just read 3Gb or less.

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