Well before the GTX 750 Ti, I had an HD3870 512Mb and never saw those artifacts.
Cant remember now, but there is an option related to z-buffer under OpenGL settings on ATI/AMD cards:
http://www.tweakguides.com/ATICAT_8.htmlQuote:
Force 24-bit Z-Buffer depth- The Z-Buffer controls the rendering of depth in 3D games, such as which objects are hidden behind others when viewed at a distance. Greater precision for the Z-Buffer means less chance of visual errors, which often appear in the form of objects showing through each other, or having missing or flashing bits. This option allows you to force 24-bit Z-Buffer precision, however I don't recommend ticking this option, as the Z-Buffer precision should normally be left to be determined by each game. If you do see a lot of errors and glitches in distant objects in games, you can try forcing a higher Z-Buffer depth, but this typically reduces performance.
Try to enable it on driver level... or also on UrT. Q3 engine gives that option too. Explanation:
seta r_depthbits "0"Quote:
r_depthbits - sets z-buffer depth. 0 uses the desktop
depthbits. A setting of 16 can result in artifacts. So
24 and 32 are recommended.
http://www.quakelive.com/forum/showthre ... uide/page3My desktop is always at 32bits colour. Do you have at 16bits?