Tech ARP posted a Supreme Commander Benchmarking Guide.
A quote from the article:
Supreme Commander Benchmarking Guide
Supreme Commander is a great benchmark for CPUs. Although it is a CPU-limited game, is also a good benchmark for graphics cards, as it shows just how much effect the graphics card has on CPU-limited games.
As we did with our Crysis Benchmarking Guide, we will be taking a look at how you can benchmark your CPU and/or graphics card in Supreme Commander. We also throw in some Supreme Commander benchmark results at the end.
Supreme Commander Benchmarking Guide