Got a Gigabyte DS3 MB with an e6300 and 2gb of DDR675 Corsair RAM. Unfortunately, I got fairly immediate prime95 errors during testing. I proceeded to run memtest86 and found that thousands of errors began consistently occuring at the beginning of test 8, random numbers (15 min in). They occurred whether voltage was set to 1.9v, 2.0v, or 2.1v. Timings are even relaxed to 5-5-5-15 when 4-4-4-12 is standard. The RAM is running at 667Mhz. Each single stick of RAM makes it through one memtest pass by itself without errors. I planned on overclocking but right now, I'm just trying to get a stable running stock machine. What could the problem be?
Although the quality of the PS you have is good, it may be underpowered for a high-end graphics card like yours, with only 15A on the +12V1 output. I'd try swapping in a less power-hungry graphics card as a test.
That's quite obvious isn't it I put in a SeaSonic S12-600W with dual 18A 12V rails. The new ATX12V standard dictates that no more than 18A be attributed to one 12V rail, so a non-compliant PSU would have to be used to have 20A on one rail... but anyway, the video card has one rail to itself in any event on this system, and 18A (as well as 15A) is more than enough to power an X1950Pro.
...but anyway, the video card has one rail to itself in any event on this system, and 18A (as well as 15A) is more than enough to power an X1950Pro.
I thought it was the CPU that had rail 2 to itself, and that rail 1 powers everything else, including drives, video card, etc. However, the other PS is a good quality PS, and I'd hope that 18A would be enough. If you're getting the errors even with memory voltage, speed, and timings all set to "auto" or defaults, I don't have any good suggestions.