Benchmark: 3DMark 11
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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.
3DMark 11 reveals what's good about the Radeon HD 7870; when factory overclocked, it's able to usurp a stock-clocked Radeon HD 7950.
This synthetic benchmark suggests that spending an extra £50-£60 on a GeForce GTX 670 will give you considerably more power, but that isn't always how it pans out in game.
