So I started playing GTA4 before patch 1.1. It was HORRIBLE. It ran at maybe 10 frames per seconds and every five minutes it would degenerate into a slideshow.
Now, after patch 1.1, it runs HORRIBLE. It runs at 30 frames per second, a big improvement, but it starts to get stuck every now and then after about 15 minutes, and 5 minutes later it just gets a slideshow again. It's just only stutters.... and it shouldn't on my settings and system.
Resolution 1650x1050 Medium - low From top to bottom (can't remember what they're called, except for the third which is car density) 22-26-100-0
I tried setting everything down which had a small improvement of FPS, but the stuttering didn't go away. It's not the car density, I can set it at anything I like and it still happens. Also it doesn't matter what I'm doing; having a car chase or just walking around randomly or going on the internet or whatever, it still happens.