Rydermark benchmark alleges Nvidia fudge
 

GAME developers on an upcoming boat racing benchmark, entitled Rydermark alleged that one of the two graphic vendors is fudging the truth with its per pixel precision. DirectX 9 requires you to use at least 24 bit or full 32-bit Shader precision.

Nvidia doesn’t let developers use more than 16 bit and of course it is much faster than 32 bit precision