Benchmarks - 3DMark 11
3DMark 11 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.
This is the only test not run on multiple monitors. The extra oomph behind the Classified enables it to leapfrog the Gigabyte in 3DMark 11.