Hi, Currently I have a 6800 GT which crashes in some games (FEAR, Half Life 2 so far). First off the whole screen fills with pink/white and some other coloured blocks and then the screen goes to sleep. The graphic card is fine in all the other games I currently play, but not these 2. As I cannot get the graphic card replaced I'm thinking about getting a nice shiny new one for my birthday. What's the best upgrade for around the 7800GT price please? And if the 7800 is the best upgrade for around that price then what kind of a difference will I see please? Thanks, Craig.