Battlefield 3 runs on Frosbite 2, probably the most advanced graphics engine currently on the market. A deferred rendering engine, it supports tessellation and calculates lighting via a compute shader.
We tested High and Normal modes and measured performance with Fraps, on a well-defined route. Note that a patch designed to improve performance on the Radeon HD 7000s came out on the 14th February. Naturally we installed it and noted a gain of between 1 and 2%.
Hold the mouse over the graph to classify cards by performance.
Once overclocked, as the XFX is, the Radeon HD 7770 easily outperforms the Radeon HD 6850 and the GeForce GTX 460 in Battlefield 3.