SLI Using Dual PCIe 16x vs 8x How Much Bandwidth is Needed Linus Tech Tips

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I use dual GTX 580s to test the performance difference caused by reducing the PCIe bandwidth. In the next little while I guess I ll do another round of testing with a high end dual GPU card such as a GTX 590 or HD 6990 and test 4x, 8x, 16x to see how much difference there is.