Benchmarks: Just Cause 2, Mass Effect 2
The Radeon HD 6990 was 6% slower than the HD 6970 Crossfire configuration when testing with Just Cause 2. However when compared to the Radeon HD 5970 it was 50% faster and 45% faster than the GeForce GTX 580.
When testing with Mass Effect 2 the Radeon HD 6990 was found to be 10% slower than a pair of Radeon HD 6970 Crossfire graphics cards. That said it was still 20% faster than the Radeon HD 5970 and 56% faster than a single HD 6970 while it also lead the GeForce GTX 580 by a 47% margin.