Read my post again and you will see that I'm not a fan boy

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Although it's obvious that games seem to be optimized for Nvidia cards these days. ...
Seriously do you think an average of 60-80fps with a system like yours is a good result?
Even with such a high resolution this is ridiculous low for an DX9 (!!!) game like Brink. ...
You said "average". What's your lowest ?
Well, even the fact that it drops under 60 with your hardware just confirms that ATI users are screwed in Brink.
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Yes, but you said you were going back to Nvidia, which leads one to believe that you believe it is better... :tongue:
Sure, Nvidia users may currently be having fewer issues with Brink, but I put that blame on SD and not ATI, since any other idtech game I run doesn't have these issues.
I'm a game developer and I can tell you that ATI beats Nvidia for OpenGL VA and VBO performance for similar generation cards, so there is no reason why ATI users should be having problems other than SD's modificifations to the idtech engine have messed it up.
Most game developers I know test on both cards.
They might use the Nvidia logo screen on startup because Nvidia has given them discounted/free cards to test with in exchange for the advertising.
But it doesn't mean the engine is specifically designed for Nvidia cards and won't work properly on ATI.
60-80 fps is ok on my system because the 30" monitor is 2560x1600, and most engines are fill-rate bound, so depending on the specific engine and game asset design this is in the ballpark for fps.
I also have all of the video settings in the game max'ed out (except AO, because SD's AO code really stinks and doesn't look like proper AO).
Brink is using idtech which is OpenGL not DX. And Carmack has designed idtech such that it typically tops out at 60fps.
SD has modified the engine (and done a bad job of that). Just compare Doom3 to Brink and the difference in performance and visual quality is significant (hint: Doom3 is older but runs way better and looks way better).
I didn't pay attention to lowest but highest was well over 100fps.
If I change resolution down to what most people are running, 1680x1050, I get 60 to 330 average 130.
Dropping below 60 is not uncommon with idtech even with high-end systems, it's the way the engine is designed.
And that isn't just an ATI issue.