Vigile writes "Both NVIDIA and AMD have recently released new extreme-high-end graphics cards with dual-GPU configurations and PC Perspective has compared them to each other with some standard SLI/CrossFire comparisons for good measure. The GTX 590 is a pair of 512 shader processor GF110 GPUs which had the potential to be the fastest combination available, but the clock speeds were lowered to such a level that is has trouble keeping up with AMD's Radeon HD 6990. Sound levels were noticeably better on NVIDIA's option though the Radeon card provided better frame rates at the highest resolutions. So, while the $700 video card market just got a pair of new competitors, the best investment for that money might still be two less expensive Radeon or GeForce single-GPU cards."
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