When starting some games my monitor will switch into an 'Unknown Mode' and go to sleep. Which I have no clue what it is doing because the games used to work before (i recently reinstalled them). For example running System Shock 2, it enters into an unknown mode. Freedom Force is running into an unknown mode. It seems that the unknown mode problem may result from an incompatibility with older games and my video card (a geforce 4 6600), but Gunbound is running into an unknown mode!
When running games such as F.E.A.R, Oblivion, or Call of Duty 2, I will eventually run into glitches. I think the glitches are due to the lighting of the game, but it progressively gets worse, eventually making the game nearly unplayable after 10-20 minutes. Here is a link to a screen shot of the problem http://philip.littlepod.net/ss.jpg