Crysis 3
Crysis 3 is a beautiful-looking game that continues to tax high-end systems. We've FRAPS'd a 30-second section near the start of the game, with lashing rain, numerous reflections and full DX11 pomp on show.
400MHz on the HD 7790's memory speed translates to an extra fps in Crysis 3. The cards are handily beaten by the Radeon HD 7850 and GeForce GTX 650 Ti Boost GPUs, though.
Overclocked HD 7790 GPUs match a GeForce GTX 650 Ti's performance. They really need to do better, especially at the proposed Ā£130 price point.