GTA IV performance:
This game is so poorly coded it runs like crap on my system. I have an Asus DirectCU II GTX 680.
Pretty much every other game looks and runs great but not GTA IV.
Even if I crank everything LOW and it looks like crap it's surprisingly demanding.
*The most demanding thing is the VIEW distance.
Anyway, if I put most everything high and the view distance is about 40 I end up with 45FPS. I tried to hit 60FPS to avoid screen tearing but can't do it without a crappy looking game.
**I also tried running at 30FPS (Adaptive half) but that seems to screw up walking and driving movement somehow and it becomes uncontrollable.
So have fun.
(FYI, in BF3 I get 60FPS in the first shooting stage tutorial at 1920x1080 and everything maxed.)