Graphics Card

Since i have this pc "no signal" error crap and i can't play ET. And people have said to me " buy a new gfx card". Which i am going too. I need some advise which wil be a good deccent card that will be just under £100.

At the moment i have a nvid 6200gt 256mb :/

Other specs if need check my profile out =D

Ps i aint being a hit whore :/ i am just laszy