Serious Sam 3: BFE
Here's a new addition to our test suite. Serious Sam 3 is, in many ways, an old-school PC game, right down to the exquisitely detailed graphics options menus. Since these are very fast graphics cards, we tweaked the game to be nearly as high quality as possible, with the exception of antialiasing, where we went with 8X multisampling rather than supersampling.
Our test run came from one of the first few levels in the game, where we did battle with a nasty boss character. In order to make our test feasible (since we did a lot of dying), we restricted our test runs to 60 seconds each.
Yikes. This one is clean sweep for the Radeons, by any measure. The GeForce GTX 580 does perform acceptably here, but it's no faster than the Radeon HD 6950. The Radeons deliver frames at more consistently low latencies, so even their 99th percentile frame times scale down nicely with the faster cards. There's a clear difference between the top two, the 7950 and the 7970, although both are incredibly fast.