[janpitor]

Originally Posted by simast

The thing is that Radeon 5770 is supposed to be worse than GeForce GTX 460.
See: http://www.videocardbenchmark.net/high_end_gpus.html

I know, but both of you didn´t state what are your graphics settings. If he uses low graphics settings and you high, he could see more FPS due to better CPU utilisation, whereas you may already be graphically limited..then try to lower the settings. Just one possible cause of action. Of course I don´t say it is definitely this way.