PCIe Standards: What You Need to Know

website pcie 3 slot An x4 PCIe device has a theoretical max transfer rate of MBsec according to wiki pcie 8x slot The QNAP one looks like it is x4 so I would need a ribbon cable and find a way to mount without fitting it in the x1 slot

pcie 3 slot PCIe Gen 4 is the latest and fastest PCIe standard available on motherboards and compatible CPUs PCIe Gen 4 cards can accommodate the full bandwidth that  Thus, a PCI Express x16 slot offers a maximum theoretical bandwidth of 8 GiBs, while a PCI Express x16 slot reaches 16 GiBs [amazon box  Sometimes, a PCIe slot operates with fewer data lanes than the mechanical slot-type indicates Notice 'SLOT 13' are PCIe x16 slots but only Slot 3 has an x8

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