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Only 2GB of ram is detected instead of 4GB. W7 64bit

by webby111 / March 3, 2010 1:38 AM PST

Hey just built my first PC. Everything has gone fine except that Windows is only detecting 2GB RAM. I have 2x2GB (4GB).
However if I use CPUZ it detects 4GB RAM in there?
Can't seem to find anywhere in BIOS to see my memory only Timings and Mhz for it.

Specs are
Intel i7 920 @ 2.66ghz
Asus Rampage II Extreme
Kingston 1333mhz 2x2GB (This RAM is on the motherboard verified list for everything double, triple channel etc)
ATI X600 (some old graphics card until next month) Hence the mega low WEI score
850w OCZ GameXStream (I know this is a lot but will be using CrossFire in the future on a better card obv lol)
Windows 7 Ultimate 64 bit

I took a screenshot of what Windows and CPU-Z is saying.

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Should be able see the total RAM at the opening window
by VAPCMD / March 3, 2010 11:19 AM PST

during bootup. Might want to change the boot screen from ASUS logo to whatever the alternative is.


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DDR modes
by Willy / March 3, 2010 11:25 PM PST

Quick thought...

Make darn sure of the ram mode you're in if at all selectable, it maybe automatic, because of DDR2 or DDR3 modes. I offer this as the slots to comply with the mode is being used. The manual should explain this and/or point out how its "mapped". I suspect with only two ram sticks, you used the immediate slots or pair, that the bios defaults to DDR3 mode, if you had a 3rd ram stick it should correct itself. Not having it, you need to verify that DDR2 is being used and the appropriate slots in order to be in DDR2 compliance. Just a thought. Otherwise, you may need a bios update, at least verify what the bios release is available, ie: if yours is ver. 3.1 and the latest is ver. 4.2, maybe an update is very helpful.

tada -----Willy Happy

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