How many PCIe lanes are needed for a multi GPU server?

pcie slot for gpu
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Some motherboards can't pass through GPUs on the first PCI slot by default, because its vBIOS is shadowed during boot up You need to

CPU PCIe is built to support gaming from the ground up with up to 16 CPU PCIe lanes and up to four CPU PCIe lanes is

pcie m2 slot My GPU is currently in the second PCIE slot, and that's because the first one is not big enough for it Ive had no problems with my GPU

pcie gen 4 in gen 3 slot Unless you have very specific reasons to have it in PCIE_X16_2 i would recommend to move it to PCIE_X16_1 You don't need x16 for anything below