Alright, so I just got a new computer, but it has a strange issue where images look compressed, as if they're a low quality gif or jpg or something. The images aren't static either, if I move around in a game, the 'compression rings' move and adjust for the new image, but it doesn't only occur in games. Whenever I save an image rendered from vue, it looks really messed up. I tried updating to the newest version of the radeon drivers but it didn't fix the problem.
dell 8100
Intel i7 2.8Ghz
8Gb Ram
1tb HDD
64 bit windows 7
Radeon hd 5770
Sorry for the 2mb image, but i was trying to show what gradients look with without any image compression.

This is a png of the vue render, ultra settings. Notice the compression rings.

This is a jpg of the same render, no explanation is required.

Any ideas?