Then install/update drivers, after which most games can take advantage of the extra horsepower we just added into the system. Once we seat the similar graphics cards in the carefully selected motherboard we just bridge them together, with a supplied CrossfireX connector or in NVIDIA's case, a SLI connector. If your motherboard does not have the SLI certification mentioned on the box, it's not SLI compatible. A SLI certified motherboard is an nForce motherboard with more than two PCIe xc16 slots or a certified X58 or P55 motherboard.A Crossfire compatible mainboard is pretty much ANY mainboard with multiple PCIe x8 / x16 slots.So along these lines, you could for example place two or more ATI graphics cards into a compatible mainboard, or two or more NVIDIA GeForce graphics cards in SLI mode. One card can do the job sufficiently, but with two or more you can achieve much more. As weird as that analogy sounds, that's roughly the same idea for graphics cards. One horse will get the job done yet by adding a second or maybe even four horses, you'll plough through that farmland much quicker and (hopefully) more efficiently. Think of a farmer with a plough and one horse. This way you effectively try to double, triple or even quadruple your raw rendering gaming performance. Multi-GPU gaming explained - Both NVIDIA's SLI and AMD ATI's Crossfire allow you to combine/add a second, third or even fourth similar generation graphics card (or in more GPUs) to the one you already have in your PC.
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