problem with gigabyte GA-X58A-UD3R

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hi i have a gigabyte GA-X58A-UD3R with 6 gig corsair xms3, problem is the mb is only recognizing 4 gig, every now and then it'll recognize the full 6 gig sometimes it'll only recognize 2 gig, is this a fault with the mb or the ram or is it a bios fault, thanks here's the full spec of my system

Case Coolermaster HAF X
CPU Intel Core i7 930
CPU Heatsink Prolimatech Megahalems Rev B
Graphics Card Asus ATI Radeon HD 5870
Hard Drive 1 OCZ Vertex 2E 120GB
Hard Drive 2 Western Digital Caviar Black 1TB SATA 6Gb/s 64MB
Hard Drive 3 Western Digital Caviar Black 1TB SATA 6Gb/s 64MB
Memory Corsair XMS3 6GB
Motherboard Gigabyte GA-X58A-UD3R
Optical Drive 1 Sony Optiarc AD-7260S
Optical Drive 2 Sony Optiarc AD-7260S
Power Supply Zalman ZM600-HP Heatpipe Cooled 600W
 
i've got it working, it seems the mb doesn't like using anything other than standard performance for the ram, i had it set to extreme and that's why i think it didn't work
 
i sent an email to the company i ordered the parts off explaining what's happening and here's their reply

"Hi,

This problem can often be caused by using an aftermarket cooler which causes the board to flex and the underside of the CPU (where the memory controller is located) to not interface directly with the pins on the motherboard's CPU socket.

If you have the original CPU cooler that was supplied in the Intel retail box see if this resolves the problem.

If not it is possible that one of the memory sticks is at fault."

i can't see it being this because i've never had the problem before and i've always had aftermarket coolers
 
I've already reseated my CPU and that hasn't made any difference for me.

got my machine on it's side for the last 3 days, results so far:

Sunday cold boot - 2GB available
Sunday warm boot - 6GB available
Monday cold boot - 4GB available
Tuesday cold boot - 6GB available

All BIOS settings at performance defaults (ie stock CPU, XMP profile, onboard audio and floppy drive disabled). I won't even go into the BIOS screen over the course of the week so I can see what happens for normal use :)

hi when it recognized 6gb did you change anything
 
I've decided if I can I am gonna change mb to a different model, can someone suggest a good mb with similar features to the gigabyte, must have SATA 6Gb/s
 
2 cold and 1 warm boot yesterday all gave 2GB available.
1 warm boot with a BIOS edit (tweaked RAM multiplier down 1 notch to 1333Mhz) and I got 6GB

I dont think lying on it's side helps :(

Next thing to try is reseat the CPU and try the stock cooler but at this rate I'm not hopeful - plus I dont want to end up with the stock cooler anyway but what the hell :rolleyes:

i'm gonna get a different mb if they ever get back to me
 
I have had this a couple of times now.

Setting the "performance enhance" setting to standard seems to have fixed it.

On default non overclocked settings the pc would sometimes blue screen and also loose 2GB if extreme setting was used.

it didn't make a difference what setting i use
 
i really need help with what to change to, i'm replacing it with a different make but don't know what mb doesn't suffer with the same problem
 
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