are the cards tweaked properly?
if so that kind of FPS difference is impossible.
>I donīt think so, and if you do, look at the poll, more people use DirectX than OpenGL
our audience is limited, and Direct-X has a head start, but i guarentee you OpenGL is growing far more rapidly, and if even part of 3D-Labs proposal goes through, then say good bye to DX.
and in any case it all comes down to a difference of opinion or what you need at the particular time, if you need a good graphics/(everything else) API and are not worried about the points previously stated, then DX is for you, but i believe OpenGL is far superior.