I have a problem with my x850XT as well. Until recently I left it with the stock fan, however I kept having to clear it of dust and it was overheating even when idle - on a black background multicoloured dots would show up, playing a game and within 30 seconds huge tears show up that get progressively worse. I have water cooling for everything else to be able to even use the card I have to have a pedestal (40cm) fan pointed into the side of the case.
yesterday the fan on the card failed (made many a grinding noise) so I replaced it with the waterblock from the Asetek WaterChill kit and hooked it up.... Thinking my overheatin problems would be over I loaded up STALKER.... within 1 minute, tears covered the screen. Even with the fan on full the card gets hopt and although only a few artifacts show up with the fan on full, 'some' is more than none.
So what could be causing this? I may have put a little too much thermal grease on the chip, could that be a factor? Also, does the grease just go on the chip or on the square around the chip as well? Having to run the pedestal fan to do anything is total crap after I paid $300 for the watercooling kit.
any helpx0rz would be appreciated
EDIT: I use ATItool to scan for artifacts and they appear (without the pedestal fan) within 30 seconds.
EDIT 2: After 2 minutes both my screens are totally covered in multicoloured dots, and the cube on atitools has significant tearing.
EDIT 3: Both desktops still showing multicoloured dots everywhere after 5 minutes of the 40cm fan on high....
EDIT 4: Also, when playing Anarchy Online or running the ATI tool "3D View" the card makes a sort of high-pitched buzzing noise........ KIND OF like a buzzing noise because I can't explain it very well, more like a lowpitched CD spinning noise?
EDIT 5: Sorry
Ok the 40cm is on high, pointing directly at the card, did "scan for artifacts" which lasted 20 seconds. Going to shut down the computer for a while to cool it down more and see if it does anything..... SpeedFan says my ambient temp is 25, CPU is 36 NB is 28. I that helps at all.
EDIT 6: Alrighty, computer turned on, ATItools started, Scan For Artifacts.... 28 seconds. Stopped it, started again, and 1minute40seconds later although it says "no errors" there is a little yellow dot on the cube.
EDIT 7: OH NOES!!!! I ran driver cleaner after following the instructions, and now when I try to reinstall catalyst partway through I get an error stating "Driver Install: the INF file was not found". of course the installation continues alopng, but it doesn't actually WORK..... After a reboot am till stuck with the broken default generic standard display adapter driver. Fun times.