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View Full Version : OpenGL vs. DirectX



Worf101
08-15-2005, 08:51 AM
I read a post here (somewhere) about which Video mode one should use with which card. I'm running an ATI based HIS Excalibur X800XT PE card. I had been running OpenGL but never could get "The Black Death" above 38FPS average under Fraps.

Yesterday I switched out the OpenGl and ran DirectX and got some interesting results. My Max FPS during TBD dropped from 101 to 89 FPS but my average rose from 38 FPS to 44! I was stunned And that's with every maxxed that I could get my hands on.

Curious...

Da Worfster

Grue_
08-15-2005, 10:00 AM
I read that using DirectX causes some graphics problems.

WWSensei
08-15-2005, 11:05 AM
The only reason DirectX seems faster is because VSync is forced off in DirectX mode. The DirectX mode is nothing more than a wrapper of DirectX calls back into OpenGL hence the occasional graphic anomaly. If you go into control panel and turn off VSync in OpenGL I'll bet your FPS will jump.

Be aware if you use temporal anti-aliasing then Vsync is forced On in OpenGL.

FoolTrottel
08-15-2005, 11:06 AM
Using DirectX, you won't have Perfect Landscape available. Hence the FPS increasehttp://forums.ubi.com/groupee_common/emoticons/icon_wink.gif ...

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