I buy a geforce 6200 128Mb of RAM 2 mounth ago, to have a direct rendering on my linux desktop. I made some test, and I see that glxinfo says direct rendering : true, and a lot of glx extensions.
But When I move a window, top says the X process use 60%-70% of processor !!! And when I watch a movie, I have some lag and the console output says I have a "too slow computer", but I have a 2700+, and my processor is use at 100%....
So I test an other distrib, fedora 7, same problem.
I update my bios revision, same problem...
here is the bug-report : http://casalinux.net/nvidia-bug-report.log
Any idea ?