I bought a Radeon HD7750 2GB just to play Far Cry. Previously I was running the game without problems, with medium quality, through my onboard video card. Upon installation of the Radeon, the game would run nicely at 1920x1200 with optimal settings. However, I made the mistake of updating the driver to 13.1. The game became jerky. So I uninstalled the new version and went back to 12.9. It remained jerky, to the point of being unplayable (it appears to freeze every half second or so). This is most noticeable when running.
Among other things:
1. I reset everything in Catalyst to the default.
2. Following someone's recommendation in this forum, I tried RadeonPro. The stuttering remains even with low resolution and low quality, and even with the frame rate over 70 fps.
3. The game is still running fine in my onboard GPU - no stuttering, nice frame rate.
I am not a technical guy. Can someone help me fix this? (Incidentally, I am running Windows 7 64-bit on a Pentium i7 3400 with 8GB RAM).