Hi guys ,i just finished building a new system with a i7 950 om a asus rampage extreme mb with 6gb corsair ram , windows 7 prof 64b .When i load up the system it detects only 2 gb ram , no matter wich slot i use or which dimm i use .Can someone help me with this ?Thanks in advance ,Gérard

i7's use tri channel memory so i presume your using 3 x 2gb? I would suggest installing one memory module at a time, booting up each time and seeing if windows detects the memory. This way you can see if any modules are faulty.I would also suggest checking your voltages in the bios, however I doubt that this will cause a detection failure.Also, does the rampage extreme have a memok function? May be worth checking...

Hi Sam ,i allready tried to boot one dimm at a time and all the dimms are working ok BUT if i put one dimm in the B or C slot only ,so no dimm in slot a, the computer won't boot , maybe it's suppose to work this way , if i put all single dimms in slot A they all are working ,It's strange cause cpu z says that the memory installed is 6144mbytesI also tried to increase the vdramm to 1.65v but that didn't change a thingGérard

Gerard: make sure your try every possible combination of slot and dimm. If you have two sets mix them up as well.

Which part of windows shows you only 2gigs? How much memory does task manager say you have (ctrl+shift+esc)?

Hi Veeray ,allready tried that as well , i have one set corsair 3x2 gb , the strange thing is cpuiz shows 6144mb ,so the question is wich one is correct w7 or cpuizGérard

try Linx using all the memory. It will tell you how much memory is available. Also how much memory is the task manager showing?Do you have the latest BIOS?

Hi Veeray ,allready tried that as well , i have one set corsair 3x2 gb , the strange thing is cpuiz shows 6144mb ,so the question is wich one is correct w7 or cpuizGérard

Hi,task manager shows 2gb ,cpuiz says 6gb DUAL CHANNEL ,allthough i use slots 1a 2a 3a ,the manual says slots 1a 2a 3a for triple channelbios 11-02Gérard

Ger: what's the exact RAM and motherboard model numbers?

Hi Veeray ,motherboard is Asus rampage extreme and the ram is corsair XMS 3 1600 tri kitI just ran memtest,at the top during test it says memory 2040 dual channel and at the bottom it shows in all 3 slots a corsair 2048 dimmGérard

http://valid.canardpc.com/show_oc.php?id=1513321here you can see the validation , it says RAM : 6144 MB DDR3 Dual ChannelGerard

Hi guys ,thanks for all the help ,it seems that a few pins from the cpu socket on the motherboard were damaged so i had to replace the board , and this time all is working fine ,Thanks again for your help ,Best regards ,Gérard

Glad you sorted it Gerard!