Crysis Warhead
The one game that brings all GPUs to their knees, Crysis is set to Enthusiast quality and FRAPS'd through the train map.
Benchmarks
Crysis Warhead tends to be a mixed bag, and though it doesn't always reflect a GPU's true ability, it shows Sapphire's Radeon HD 5970 TOXIC 4GB in a positive light.
It's the first single graphics card - albeit with two GPUs - able to offer playable framerates at 2,560x1,600 with enthusiast settings. Sapphire's card is comfortably ahead of a stock Radeon HD 5970, and Crysis clearly doesn't scale well in two-card CrossFire configurations.
NVIDIA's GeForce GTX 480 in SLI scales surprisingly well and offers the best overall Crysis Warhead performance, at a cost of around £80 more than Sapphire's best.