Interestingly enough, the QBIC 3901a cuts in line here, edging out the K8TPro-939 by a little over 2.5 FPS.
Doom 3
In Doom 3, the tables turn and the K8TPro-939 beats the QBIC 3901a by 2 FPS. It's important to remember that these variations of 2-4 FPS are well within the margin of testing error, and should be disregarded. For all intents and purposes we can say that these two products score identically in these tests.