Motherboard: ASUS M2N-MX SE PLUS CPU: AMD A64 x2 4400+ @ 2.3GHz PSU: ATX switching power supply with 450W max. Graphic Card: PNY Geforce 8600GT 512MB GDDR3 when i run counter strike source MANY boxes appear and fill up the whole screen in a pattern and they are usually green or a bright purple ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ****This happens with EVERY game i play.**** Sometimes even videos in windows media player. When i first tried my PNY GeForce 8600GT with Counter strike source, this problem didnt happen, i was even running at HIGH everything Anti Aliasing and anistropic filtering at 150 FPS+, then suddenly when i tried to run counter strike source,this happened. My graphics card runs at around 60C. if you can, provide me with any help you can give. Thank you very much. * I believe the boxes are called artifacts* and they are laid out in a chess like pattern.