arite this is my problem . i just got my ge force 6600 GT recently and yea wow good stuff but whenever i join a game like HL2 my moniter just blanks out, like black but the power seems to be on still, but anywazs i installed drivers and etc.. but not sure if i did the bios thing wrong? or do i need a power supply??? i aint sure!! plz help me!!!

geesh why is noone helping me? has anyone encountered this problem b4??!?!?

Give us some system specs: CPU,Mem,drives,fans,power supply,monitor.

Something tells me that your monitor can not handle the resolution and refresh rate.

HL2 is a very demanding game. Have you tried it at the lowest resolution? When the monitor comes back on, are all your icons moved around?