FRAPS is a real-time video capture and benchmarking tool. I started using it since version 1. FRAPS latest version 2.9.8 now. It is a great tool to benchmark 3D games performance when the 3D games did not support benchmarking function. Besides benchmarking, FRAPS supports other nice features like screen capture and realtime video capture. The realtime video capture quality is nice. It is identical as the way you play in the games. Check out these videos at FRAPS website.
