My OpenGL application have wierd performances. When I run it in 1280x1024 I have aroud 100fps and when I run it in 800x600 I have around 300fps. Now, the wierd thing is if I run it in 1280x1024 again (ie after running it in 800x600) I have 300fps too!
If I reboot, I’m back at 100fps in 1280x1024, but I just have to run it once in 800x600 to have 300fps in 1280x1024 (until next reboot).
I have the same problems with my applications using GLUT and SDL. I have a built-in fps counter in my applications, and I’m using fraps to be sure that’s not the problem.
I just reinstalled Windows XP and I had the same problem before. I’m using last drivers, updates, etc. I have a Pentium 4 and a GeForce 4200.
Anyone have a clue? That’s really wierd.