Cinebench and 3DMark06
The Cinebench 9.5 benchmark is an OpenGL 3D rendering performance test, based on the commercially available Cinema 4D application. Cinema 4D from Maxon is a 3D rendering and animation tool suite used by 3D animation houses and producers like Sony Animation and many others.
And of course it's very demanding of system processor resources.
This is a multi-threaded, multi-processor aware benchmark that renders a single 3D scene and tracks the length of the entire process. The time it took each test system to render the entire scene is represented in the graph below (listed in seconds).
Whether run in single- or multi-threaded mode, Cinebench 9.5 reported very similar results for the E6750 and E6700. Both processors rendered the scene in the same amount of time in the multi-threaded test and in the single-threaded test only 1 second separated the two processors.
3DMark06's built-in CPU test is a multi-threaded "gaming related" DirectX metric that's useful for comparing relative performance between similarly equipped systems. This test consists of two different 3D scenes that are generated with a software renderer that is dependent on the host CPU's performance. This means that the calculations normally reserved for your 3D accelerator are instead sent to the central processor. The number of frames generated per second in each test are used to determine the final score.
It seems that 3DMark06's built-in CPU benchmark benefits from the additional memory bandwidth afforded by the E6750's higher-clocked front side bus. In this test, the Core 2 Duo E6750 finished 111 points ahead of the Core 2 Duo E6700, a difference of 4.7%.