Hello Alejandro Nova!
Thanks for the tip! It seems like it has helped at least a bit (but my FPS is now 250
). Unfortunately I have no Compiz-Fusion-icon - probably because I'm using Xubuntu. But I can fix that on compiz startup instead..
By the way, it seems like the Benchmark-plugin is one of the things that makes the speed drop.. wierd, huh?
Unfortunately I have only tested for some minutes now, but I will do some more extensive testing when I have got the time.