W1zzard: A part of what makes the Radeon R9 290X an exciting option at its price is that two of them only cost 10% more than a single GeForce GTX TITAN. If you don't already know what kind of performance is on offer at $549, check out our comprehensive review of the Radeon R9 290X.
AMD is already talking a lot about how the R9 290X is ready to deal with the new generation of 4K Ultra HD monitors, which beam out 3840x2160 pixels (about 8.2 million pixels). We've been testing 5760x1080 (about 6.2 million pixels) for a while now and are fairly confident that the current generation of high-end graphics cards shouldn't make games seem like slide-shows at Ultra HD. Two of them in multi-GPU configurations stand an even better chance.