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Sphax

60 FPS max ?

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Hi every body, I'm writing litle apps to teach myself OpenGL, using Glut (may be my problem has nothing to do with glut, but it's just an information . The maximum FPS i can get even with an empty scene is approximately 60 FPS. If i make my main loop a litle bit slower, my frame rate drop to 30 FPS. I was thinking it has someting to do with vertical sync, but when disabling this from the drivers settings, no changes ... Have you got an idea ? I forgot : I've an AMD 1600 with a GeForce 3, i'm sure it can do much better than 60 FPS Sphax [edited by - Sphax on July 2, 2003 12:59:10 PM]

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Thank you George, it helps me very much, may be you should read my post to the end ?

Sphax

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what frequency do you have on the screen? it still seams to be vsync, else a jump from exacly 60 to exacly 30 would be VERY strange.

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I''m quite sure my frequency is 60Hz (can you change this when running Ogl app in fullscreen ? a recent post tends to say no, unless you download an evil application i don''t whant to use ), and i agree with you that the drop to 30 FPS is probably due to vsync.
So i have disabled vsync in the drivers settings (from the desktop properties), and i still have the same problem .

I''m running under Windows XP , no one have experienced the same problem ?

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Guest Anonymous Poster
Right click desktop, click Properties->Settings->Advanced->Monitor

then adjust the refresh rate here.

I''m using Windows XP Pro and it might be different for you. Don''t know OpenGL, but it is a vsync problem. My solution will just increase your framerate from maybe 60 fps to 100 fps and probably isn''t exactly what your looking for.

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Myopic : no, i didn't try that, cause i didn't know it was possible. Thank you, i'll shearch the way to do it.... May be you can help me ?

Anonymous poster : Oh i have tried this also (and also my refresh rate is never 60hz, it hurts my eyes ) , but when you run Ogl in full screen, it seems to swap to 60 Hz ...

[edited by - Sphax on July 2, 2003 1:42:31 PM]

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If you''re using WinXP, the Nvidia cards experience a bug where they''re limited to 60Hz. You can circumvent this by using a utility such as NVrefresh or something similar. This allows you to set your Nvidia card to any mode that is allowed by your monitor.

Hope it helps.

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