Excuse the double post, but from the time I made the last one until now is how long it took to crash (forcing a restart). Everything was running great up until that point, which is different than the random lags.
I don't know if it's after 30 minutes, but it definitely slows down and freezes at some point. I had to restart a few times but I can usually catch it before I need to restart.
Lately I've been noticing a lot of lag where my FPS will drop to 0 and force me to restart my computer. Even when settings are turned to the minimum, I'll still experience the lag. My video card is an HD4870 and I usually get 60 FPS in GTA:SA single player and every other game runs fine. I was wondering if anyone knew how I could stop the lag or anything...