Summary Diagrams

First of all, I suggest that you take a look at the advantage of the dual-processor GeForce GTX 295 over the fastest single-processor graphics card GeForce GTX 285. The results are shown for the overclocked Core i7 platform.

Since these two diagrams compare fast graphics cards, I guess it would be correct to evaluate them by the least CPU-dependent modes, i.e. at high resolutions and with high graphics quality settings. For example, the GeForce GTX 295 has an average advantage of 47.5% over the GeForce GTX 285 at 1920x1200 and in the FSAA mode, but the gap is smaller (33.5%) at 1280x960. Anyway, you can see that the dual-processor card is far faster despite its lower frequencies and smaller amount of graphics memory.

The next two diagrams compare the platform with a Core i7 920 processor overclocked to 4GHz (and with 3GB of DDR3 memory clocked at 1.6GHz) and the platform with a Core 2 Quad QX9650 overclocked to 4GHz (with 4GB of DDR2 at 1GHz). The results are shown for the GeForce GTX 295 card.

It is logical: the easier the game is for modern graphics cards, the higher the performance growth from the change of the platform, and vice versa.