At the request of some of our readers, I have included results from the 3DMark05 benchmarks even though it slightly goes against the take on real world gaming. For a completely new architecture though, it can give us some valuable information on the possibilities for the R580.
At the default resolution of 1024×768, the 7800 GTX 512 single card falls behind the new X1900 XTX by a 15% margin and the X1800 XT loses by 22%. However, in comparing SLI and CrossFire, the 7800 GTX 512s are just a bit faster. In our higher resolution and quality settings tests, the X1900 XTX’s lead increases to 30% and the CrossFire platform is able to overtake the SLI config by a modest 7%.
As expected, in our first graph we see the X1900 XTX take the lead in the pixel shader test with its 48 pipelines going hog-wild. In the vertex shader results, we actually see a small decrease in the performance of the simple vertex shader test that for some reason isn’t able to scale. The complex test though has the expected performance jump. In our fill rate test, the X1900 and X1800 are basically identical in their performance again showing that ATI didn’t make any changes to that portion of the R580 architecture.