i7 build - having problems :(

theukmoog · 31 Jan 2009 at 16:15

Posting this on behalf of a mate who is currently PC-less, mid-build.

Main components are...

Asus Rampage II Extreme Intel X58 motherboard
Intel Core i7 920 CPU
6GB of Corsair DDR3-1600 (TR3X6G1600C8D - 3x2GB kit)

Corsair list the memory as being compatible.

RAM Voltage is set to 1.65v
BIOS is version 1001, the latest release from Asus.

As the manual says, he has the 3 sticks in the blue slots but the BIOS is only see 4GB RAM rather than the 6GB installed.

With only 1 stick in slot 1 it won't even POST.
With a stick in slot 1 and slot 2, it boots and the BIOS sees 2 GB rather than 4GB.
Moving the sticks around makes no difference.

For completeness, have run MEMTEST on all 3 sticks with no errors.

To me it sounds like slot 1 is dead but before just shipping it back, any suggestions as to anything else to check out?

Any help appreciated!

StephenLawUK · 31 Jan 2009 at 16:17

Theres a setting in bios called memory mapping or sumthing similar on asus boards that you need to enable for it to see more then 4GB sticks if i remember.

95thrifles · 31 Jan 2009 at 16:17

is he using a 32bit operating system?

StephenLawUK · 31 Jan 2009 at 16:22

i thought bios was able to see all the ram even on a 32bit OS, just the OS cant see it.

theukmoog · 31 Jan 2009 at 16:24

95thrifles said:
is he using a 32bit operating system?

We're still at the BIOS stage, no OS (hence I'm posting this up)

95thrifles · 31 Jan 2009 at 17:53

Ahh sorry my mistake, you have got them in the right slots? Either all blue or all white?

theukmoog · 31 Jan 2009 at 18:23

95thrifles said:
Ahh sorry my mistake, you have got them in the right slots? Either all blue or all white?

All blue, as the manual directs.

Coming to the conclusion that slot 1 is dead as a dodo and the board needs RMAing

sithlord · 31 Jan 2009 at 19:44

Have you checked the CPU cooler is on and clicked into place ? Too hot a CPU will cause problems for the IMC.

theukmoog · 31 Jan 2009 at 20:57

sithlord said:
Have you checked the CPU cooler is on and clicked into place ? Too hot a CPU will cause problems for the IMC.

Thanks for the suggestion... water cooled and highest core temp seen was 38C.

tonytiger · 31 Jan 2009 at 22:51

I had a similar problem with 4gig showing in bios instead of 6gig.When i checked the 1366 socket one of the pins was slightly bent (bottom of socket ,2 across right hand side).Bent/aligned the pin back to postion.After i did this the bios reported 6gig.

I am not saying this is your problem but it could be worth checking the pins to see if any are out of line and not making contact with the base of the cpu.

theukmoog · 31 Jan 2009 at 23:46

He groaned when I suggested lifting the CPU and checking the legs but he'll take a look tomorrow. Thanks for the suggestion.

theukmoog · 12 Feb 2009 at 22:21

Just in case anyone searches for similar symptoms... he RMAd the motherboard and the replacement worked perfectly, so it was just a duff mobo.