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.
Nvidia's partners must have been rubbing their hands in delight when they first realised how much quicker than stock their overclocked wares would be. Inno3D's iChill GTX 980 Ti Black quite happily boosts to a staggering 1,443MHz during real-world use, resulting in a performance increase of up to 22 per cent over the basic reference card.