All Ram Not Recognised

[nick24okc]

Problem:
My system is only showing 2558MB RAM. (Last week it was showing 2816MB) I have 3GB in the system.

Total System Specs:
Intel E6750 2.66GHZ 1333 / 3GB 800MHZ DDR2 RAM 4-4-4-12 / SLI 512Mb (1GB total) nVidia 8600 GTS / Vista HM Premium / nVidia 680i SLI mainboard / 250GB 7200RPM HDD / Ageia Phisx / Soundblaster XFI Extreme Gamer

Ive Tried:
Updating the bios, reinstalled drivers, replaced the ram with ram from my other system which also has Vista Home Premium 3gb Ram 2x (SLI) 512Mb nVidia 8600 GTS (that system shows 3GB ram.) So i know its not the Ram.

Any suggestions?

 

[Daveskater]

I'm assuming you purposefully bought 3GB of RAM because you're using a 32 bit OS

Did you make any hardware or software changes before this happened?

 

[nick24okc]

Yes I only put in 3GB because im running Vista 32bit. I know the limitation hehe 8o)

No, I havent made any changes on the system. I had though about that, but I only play games on this machine and I havent made any changes or updates. Unless windows updated itself, wich is very possible since I have it auto update.

Today I did an OSRI and installed Vista Ultimate and re-installed all my drivers and same thing. I tried memory from my other system and same thing. I can only think that its something to do with Windows, because the 3gb shows in the BIOS.