I recently built a new machine, with the following:
The machine's unstable. The BIOS has a copy of memtest86 modified
BIOSTAR TpowerX58 LGA 1366 Intel X58 ATX Intel Motherboard
Intel Core i7 920 Nehalem 2.66GHz 4 x 256KB L2 Cache 8MB L3 Cache
OCZ Platinum 12GB (6 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
SeaSonic S12 Energy Plus SS-550HT 550W ATX12V V2.3
Powercolor Radeon x1950 256mb.
to support the Core i7 but with all six sticks of ram installed,
it'll freeze after a few hours of testing.
At this point, having tested just about everything, I think it's
either the motherboard, cpu or a thermal problem.
My main questions are:
Power supply assumed to be good. Voltages in BIOS appear
to be correct and stable.
Removed CPU/heatsink. Cleaned stock thermal compound with
Arcticlean solution. Applied 'Zalman Grease' thermal compound.
CPU 30 - 35C
Tested ram sticks 1 .. 2 in slots 1 .. 2, 7.5 hours, no problem.
Tested ram sticks 1 .. 3 in slots 1 .. 2, 7.5 hours, no problem.
Tested ram sticks 1 .. 4 in slots 1 .. 2, 7.5 hours, no problem.
Tested ram sticks 1 .. 5 in slots 1 .. 2, 7.5 hours, no problem.
Tested ram sticks 1 .. 6 in slots 1 .. 2, 7.5 hours, no problem.
Tested ram sticks 1 .. 6 in slots 1 .. 6, page fault after 4 hours.
Tested ram sticks 1 .. 2 in slots 5 .. 6, 5 hours, no problem.
Suspicious of slot 4. Page fault occurred when accessing
8gb - 10gb. If memory is arranged sequentially from slot
1 .. 6, slot 4 contains the 8gb - 10gb range when using
all six sticks.
Tested ram sticks 1 .. 4 in slots 3 .. 6, 12 hours, no problem. Shows what I know...
What sort of temperatures should I be seeing from the CPU,
Am I going to need additional cooling with all six sticks
of ram in there? Currently using Zalman Grease compound on
the CPU and three case fans (2 x 80mm and 1 x 120mm). Case
seems to have decent airflow.
Anybody got any other ideas? I'm at a loss as to how to
get this machine to stay alive, otherwise.