Im not sure if my video card is overheating, artifacting or what... It only seems to happen when i use drivers for my vid card... Screen Shot from UT2k4:
try changing/updating your drivers, if that doesnt work try taking off the side of the case and using a fan to blow air onto it
AMD Athlon XP1500+, MMX, 3DNow, ~1.3GHz 1024mb ram Geforce4 Ti4400 153gb harddrive 415watt Power supply Dunno what motherboard i have or anything else... my dad made it 3yrs ago though