I've heard of cases where just EMI from other devices close to the PC caused issues - in one case, just moving the PC sounds subwoofer away from the PC cleared up issues.
:D
Dude so far this thing has been running for almost 3 hours with no screen blanking, which to date is a record. Following your input, i removed all EMI emitting devices from my puter dojo. This included:
-Cheapo Harmon Kardon desktop speaker set and sub woofer.
-MS Sidewinder 2 Joystick.
-2 wifi AP's on different bands.
-HP 1610 PSC Printer
I also unplugged the transformer brick for any device that had one, save for the one i needed on my little workgroup switch for general net access.
This is a wonderful development, though I am probably being a little overzealous with what i removed from the environment. I plan on making certain this isn't a fluke and stay in minimalist mode here for a few days before I put everything but the sub woofer back in place. I will keep everyone informed, going to rock some L4D2 and see if I cant summon another screen blank before I call "ollie ollie oxen free"...
Dave, thank you for taking the time to share your inside info, hopefully you don't spend any off time on here like some bus man's holiday, and your forum involvements are subsidized somehow... If they aren't you are a true gentlemen sir. :bowdown