What is PCI Express? Do PCIe lanes, slots, and versions matter?

pcie slot dimensions   Dan pcie 4 gpu in pcie 3 slot

However, some PCIe slots also have more data lanes than their size Therefore, some PCIe x16 slots might only have x8 PCIe lanes Usually, this

The PCIe x8 Gen3 backplane supports a PCIe Gen3 target cable adapter installed in the OSS target slot and up to one or more PCIe x16 expansion cards Card capacity and size · Slot 1: up to x16 lanes · Slot 2: up to x8 lanes · Slot 3: up to x16 lanes · Slot 4: up to x16

holiday ride slot PCIe network cards are designed to fit into larger slots , but they cannot fit into smaller slots; for instance, an x8 card PCIe Slot half size full size Connectors: 1 x 59 pin key A+E male > 1 Dimensions without PCIe connector: ca 90 x 24 x 5 mm Item