Over clocking shows roughly a 5 FPS increase in Q3 Normal and a 7.4 FPS increase in Q3 High Quality. Little performance is gained in Unreal Tournament. I feel that the Viper II is a steal. I will admit the drivers are still a little buggy, but in my own tests I did not encounter any problems at all. With future driver and bios updates, the performance will increase even more.
Lets only hope.
I am going to give the card 4.5 out of 5 VH points. The installation was a snap and the drivers installed easily. The performance is great and the price is low. The image quality in Unreal Tournament and Quake 3 is amazing.