I got into a game today and started playing. After about 5 minutes or so my screen went dead black and about after a minute it started working again, but the lag was unbearable. After a minute of lag, it went black again, but just stayed black.
My computer is rather junky, but I'm pretty sure it exceeds requirments.
AMD 1.1 Ghz
256Mb RAM
Sapphire Radeon 9250