Forums > Jitter

openGL context on multiple monitors

Apr 29 2006 | 11:40 am

Hi All,

there is a huge performance problem when some openGL context is
displayed in a window extending multiple screens, typically 2
monitors driven by the same graphic card;
here on a DP G5 2.7Ghz with an ATI Radeon 9600, the frame rate is at
25fps when the window is entirely on one screen, but as soon as it
extends on 2 screens, fps drops at 12 fps…

this topic has been probably discussed before, i think there are
graphic cards which handle much better dual monitors display
(nVidia?), or probably there are some new ones coming out there (the
Matrox DualHead2Go box);

any advise or recent experiences on this issue?

Yves Bernard
asbl iMAL vzw
rue d’Alost straat 7
1000 Bruxelles/Brussel
tel 32 2 213 37 10

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