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Most recent PC's motherboards have PCIe slots just for PCIe cards to be installed in the corresponding PCIe slot (The slot is as wide as orpcie slot,The Matrox PCI and PCIe technology guide explores the importance of evaluating different slot types when buying add-in graphics cards

A PCIe x1 slot has one lane and can move data at one bit per cycle A PCIe x2 slot has two lanes and can move data at two bits per cycle (and so pcie slot,My first PCI-Express slot is defective because it doesn't recognize any graphic cards But when I insert a PCIE 1x LAN card it works without problem

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