As you can see the stock performance of the Big Bang Marshal isn't quite up there with the Asus Maximus IV Extreme competition, but you're not going to be spending this much on a board to leave it at stock speeds.
The 5.2GHz result is frankly incredible, but when the CPU is seriously stressed it can downclock itself. That said in gaming terms it still maintains that lead.
The Just Cause 2 benchmark was run with two GeForce GTX 560 Ti cards in SLI, and at 1680x1050 so as not to be limited by the graphics cards themselves. With a healthy overclock on the CPU the games still fly along.
CPU Rendering performance
CPU video encoding performance
1080P gaming performance