3DMark
3DMark is the latest version of this hugely-popular synthetic benchmark. Making use of DX11 features such as tessellation, compute shaders and multi-threading, it provides modern-day results and is available as a free download.
The real single-board competition comes by way of the also-dual-GPU GeForce GTX 690 and the just-released GeForce GTX TITAN. The Club3D card is able to beat both into submission, though it's a few per cent slower than two HD 7970s run in CrossFire.