My SLI-D has now decided to play a silly and very annoying game...
I'm running it with 2 x 512MB Corsair XMS4400, which I know can sometimes cause issues. Now here's thing: a couple of weeks ago when I'd put the rig together, I did the usual testing. I could get the RAM up to 290MHz fully stable, and the CPU at 2700MHz fully stable (3700+ San Diego). I left the rig at 270 x 10.0 for over a week with no issues, but then it started to crash/lock in Far Cry. I backed down to 2600 (289 x 9.0) and that was fine for a couple of days. The the thing started to BSOD all the time. I tried dropping the RAM/CPU ration to 180/200 and all was fine. For about two days, then more BSODs. Since then I've been lowering and lowering the settings to try to stop the stability troubles. Finally last night I discovered that the issue was that the RAM would no longer play with this board. My old XMS3500 is fine, and the 4400 is fine in my NF7, but even at 200MHz the 4400 BSODs within minutes in this board, at any BIOS settings you care to try.
So what has happened? This rig was rock solid with this hardware at pretty good settings for two weeks, no it won't even lift off the ground. The BIOS is the same. It's not software because a) Windows XP 32-bit and 64-bit have the same issues, and b) as I said, if I swap the RAM it goes away. I can't think of anything that has changed that is common to both boots. I really do not want to buy different RAM, but that seems to be the only solution ATM.
Anyone got any ideas? I'm reluctant to try a beta BIOS because it won't answer the question: why did it work before, but not now?
M