after initial install of 6800. i get medium artifacts, mainly polygons, and freezing in any game and benchmarks. After many useless driver replacements to fix it i revamped the computer. it needed it anyway.
i also had another computer with a celery 2.0 & biostar mobo U8866 that i tested the card in, it ran fine in all bemchmarks with no artifacts. So I new it was hardware conflicts in my main system, cuz most my software were same on both puters.
Once i got XP Pro up again with all settings at low or disabled, I worked up enabling and upping features to meet my 24/7 oc settings as b 4 (see sig). I finally found out that the PNY 6800 did not like the 12x200@2.4ghz setting. My old stable 2.4ghz setting is 12x200 and voltage is 2.05. My new STABLE 2.3ghz setting is 11.5x200 and voltage is 1.95. I was able to repeat the freezing by upping voltage to 2.05 and multiplier to 12x. I haven't tested it yet, but perhaps the 6800 draws too much power? ...and cpu needs more juice?
the 2.4ghz setting has been 24/7 for 2 years. strange. So I advise everyone to start from scratch ad work up...not work from a stable oc before u installed the card.