The errors happen in test #5, which takes about 45 minutes to get to. But I later learned that tests can be manually selected - once I select test #5 it takes about 10 minutes before the errors begin.
running 4 DIMM slots yields 166MHz memory all the time, no matter how fast the memory actually is... it's part of the nForce chipset... I'd run it at 166, as the memory controller is on the CPU, so the speed really doesn't matter much. check benchmarks if you don't believe me.
Anubis
No Lifer
It's not just limited to the chipset, but to the JEDEC spec of DDR400 which is calculated with electrical considerations. As Anubis said, it can be done, but at 2T - and with some luck.
Newer versions of AMD processors (Venice onwards) have upgraded memory controllers and can run 4 sticks at 400Mhz at 2T.
I see a lot of people saying that the AMD processors don't support 4dimms at DDR400 which is true only for the pre E revision processors. The OP has an E revision processor and absolutely supports 4dimms at DDR400 at 2t. If that is not being achieved than there is either a bad cpu, motherboard, memory or psu (or not enough power as OCZ suggested).
YES: OCZ tech support flatly stated to me that my processor, mobo and memory configuration should run at DDR400!
So thats y my 1 gig of 256 sticks are running slower than usual. And I have the same mobo, and it's the last time i buy 1 for Overclocking...
FINAL UPDATE -- AND A BIG TIP TO ANYONE STRUGGLING TO GET 4x STICKS OF RAM RUNNING AT DDR400!!!
I now have my system running at DDR400 reliably. I have over 24 hours of memtest86+ tests without a single error, and nearly that much "user" time with no problems.
Here's what I did - instead of installing the memory sticks in the "matched pairs" as supplied by OCZ, I mixed them up. Much to my surprise that did the trick!
As it was explained in another forum:
"The problem is that populating all four DIMM slots on a motherboard puts a high capacitive load on the memory controllers. That load, in turn, can have a negative effect on the signal quality and hence hurt the ability of the system as a whole of operating at very high clock speeds.
As for what you can do, sometimes it is worth swapping the modules around to see if it will help. Sometimes there are unit to unit variations and installing the modules in a different order can help with your configuration."
I now have my system running at DDR400 reliably. I have over 24 hours of memtest86+ tests without a single error, and nearly that much "user" time with no problems.
Here's what I did - instead of installing the memory sticks in the "matched pairs" as supplied by OCZ, I mixed them up. Much to my surprise that did the trick!
As it was explained in another forum:
"The problem is that populating all four DIMM slots on a motherboard puts a high capacitive load on the memory controllers. That load, in turn, can have a negative effect on the signal quality and hence hurt the ability of the system as a whole of operating at very high clock speeds.
As for what you can do, sometimes it is worth swapping the modules around to see if it will help. Sometimes there are unit to unit variations and installing the modules in a different order can help with your configuration."
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