Playing GTA4, in a certain part of the city, I noticed that when looking at the ground from a certain angle, a weird thin line appears. It is rendered under everything, and vehicles can drive over top of it and have it stay on the ground.
it's fixed by turning shadows off.
Running a Sapphire HD 5770 Vapor-X on 10.5 drivers.
EDIT: It's also worth noting that I ran 3dmark vantage, and then furmark for 5 or 10 mins, and didn't see any artifacting.
Sounds like a bug in the game to me. I have seen similar things in quite a few games. GTA4 was designed for consoles and the port to PC was not really great. Make sure you have all the patches.
that's what I thought
Just for peace of mind though - if I were, say, experiencing a failing GPU, I would be seeing many issues, correct? And since a stretched line is generally a sign of vram issues, ti would be rendered over everything instead of uder everything right?