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Benchmarks: DiRT 3, Far Cry 3
The Radeon HD 7990 spat out 140fps at 2560x1600 in DiRT 3, allowing it to match the performance of the 7970 GHz Edition Crossfire cards. This then meant that the 7990 was 17% faster than the GeForce GTX 690 and 50% faster than the GTX Titan.
The DiRT 3 frame time performance of the Radeon HD 7990 wasn't bad either and although the GeForce GTX 690 did sneak ahead there wasn't much in it. The 7990 was just 3% slower than the GTX 690, while it was 11% faster than the GTX Titan and 4% faster than the 7970 GHz Edition Crossfire cards.
The Radeon HD 7990 average 60.3fps in Far Cry 3 at 2560x1600 to narrowly beat the GeForce GTX 690 by a 1% margin. Surprisingly this meant that the 7990 was 5% slower than the 7970 GHz Edition Crossfire cards. Still it was 27% faster than the GeForce GTX Titan, 91% faster than the GTX 680 and 73% faster than the Radeon HD 7970.
The Crossfire frame time performance is very poor in Far Cry 3 and here the Radeon HD 7990 took an average of 43.2ms between frames, which is slower than a single Radeon HD 7950 or GeForce GTX 670 graphics card. As a result the Radeon HD 7990 was 44% slower than the GTX 690, 42% slower than the GTX Titan and 20% slower than the GTX 680.