Combining just two Radeon HD 6990s gives processing power of over 10 Teraflops!
The GeForces are based on a more effective design but have fewer processing units and just half the processing power. The GeForce GTX 590s in SLI have only 5% more processing power than a 3-way GTX 580 SLI system. However they have 14% more memory bandwidth.
For this test, we opted for 2560x1600, the highest single screen resolution, and 5760x1080 in surround gaming on three 1080p screens. Naturally we used maximum quality settings in all games.
We no longer show decimals in game performance results so as to make the graph more readable We nevertheless note these values and use them when calculating the index. If you’re observant you’ll notice that the size of the bars also reflects this.
The Radeons and the GeForces were tested with texture filtering at the “quality” setting. All the Radeons were tested with the Catalyst 11.4 preview 2 (8.84.2) driver. All the GeForces were tested with the 270.51 beta drivers.
Intel Core i7 980X (HT deactivated)
Asus Rampage III Extreme
6 GB Corsair DDR3 1333
Windows 7 64 bits
Forceware 270.51 beta
Catalyst 11.4 preview2 (8.84.2)