1. 1680x1050 (I run dual monitors, both at this resolution, but games only on the left monitor)
2. 1680x1050
3. Good, except the newer stuff like Bioshock isn't as smooth as I'd like. Waiting on Nvidia's next card (G92) before upgrading though. Also interestingly, running dual monitors doesn't seem to impact games FPS much.
4. C2D E6600, 2GB ram, 7900GTO