Sometimes I got black screen of death. This happen normally after I join a server or after the server change map.

If I press the Windows key to zoom out from full screen and zoom back in, then I get white screen of death. This normally at initial stage when the server is joining.

If you want to confirm whether the GC is overheat due to improper ventilation, run furmark.

This will heat up the GC. Last time I traced it to the dust blocking the heatsink fin and caused my Radeon 2600XT to heat up to 100C.