PCIe VS : What are the differences and similarities?

pcie 2 slot   Dan pcie slot sizes

One more detail: the motherboard is SuperMicro X10SRi-F that provides 6 PCI-Express slots: 1 PCI-E ×2, 1 PCI-E ×4, 2 PCI-E ×8, 1 PCI

I am not sure if this is due speed issues or lack of enough power on the PCIe slot, even though the GPU has an 8 pin power connector Please be aware of It says on the MOBO description that the PCIe X 16 slot is default disabled Have never had that board, you probably need to look around the

linear slot drain A PCIe lane is a single data channel within a PCIe slot Introduced further doubling of data rate per lane compared to PCIe , providing higher performance PCIe x16 Gen expansion backplane with two slots The PCIe x16 Gen3 backplane has two PCI Express x16 slots, with one slot supporting the OSS target