PC missing 256mb ram should be 1gig. Need Help!

SteveN_25 · 22 Jun 2006 at 18:15

Hi I upgraded my computer and bought an ASUS A8N-VM CSM motherboard. I then used my 1gig of ram in my new system. The ram consists of a 512 and two 256 sticks, both are ddr.

But my problem is that it will only pick up 768mb

My mobo has 4 slots

Channel 1 Dimm_a1 and dimm_b1
Channel 2 Dimm_a2 and dimm_b2

Have I got my ram in the wrong places and could that be why its not picking up the full 1gig.

my arrangement:

A2 EMPTY - CLOSEST TO CPU (blue slot)
A1 512 (blue slot)
B2 256 (black slot)
B1 256 (black slot)

I have turned off the onboard videocard so its not that.

Could it be a bios setting i have no idea about the bios but can someone help me cos its really annoying me lol.
cheers
steve

Cyber-Mav · 22 Jun 2006 at 20:21

one of the 256mb sticks is not seated properly or its duff.

SteveN_25 · 22 Jun 2006 at 20:35

tested all sticks and they are working, pretty sure all chips are seated properly but I'll re check.

Does anyone else use this board with 3 ram chips.
Is there anything in the bios that could be taking the 256.
thanx
Steve

hp7909 · 22 Jun 2006 at 20:44

Check manual/website/etc under 'Important notes on memory configurations' & 'DDR Qualified Vendors List' to see if stick/s meet requirements. Suspect one of the 256's because 1024 - 768 = 256