Benchmark: 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.
The 2010 Radeon HD 6850 has proven to be a real thorn in the HD 7770's side, and that's still very much the case. Based on the 3DMark 11 results, Sapphire's HD 7770 Vapor-X isn't a noticeably better performer at 1080p than the company's own cheaper HD 6850.