3DMark06
3DMark06 combines the results from its graphics and CPU tests in order to reach an overall score. Here's how the processors did overall and in each of those tests.

The QX6700 lands the top spot in 3DMark06, for reasons that will become clear as we look at the rest of the results.

Our test systems are largely limited by the graphics card throughout 3DMark's four main graphics tests. Obviously, this isn't where the QX6700 distinguishes itself.

3DMark's CPU tests, however, are widely multithreaded, and our quad-core processor excels in them. Here's how FutureMark describes what's going on in these tests:

Both CPU tests use our new game engine, and rely on AI, physics and game logic to generate a multi-threaded workload that can be distributed on multiple processors, cores or even on a single processor. Ageia PhysX library and D* Lite path finding AI algorithm are produce [sic] demanding CPU loads.

Because the results of the CPU tests help determine the overall 3DMark composite score, the QX6700 comes out on top there, as well.