Is a MacPro3,1 x16 slot PCIe or ?

PCI-E x16 Expansion Slot -- HPC-7140 Supplier: Advantech Description: 1U Rackmount Server Chassis for MircoATXATX Server board with 4 x Hot-swap Drive

TPM Expansion Slots Internal Mini PCIe, 2x Mini-PCIe Internal , 1x for NVME SSD Support PCIe Slot, Yes PCIe Expansion Details, PCIe x16 Dual

pcie 50 x16 slot SATA 3 Expansion Cards; Network Adaptors; Video Capture Cards PCIe x8 & PCIe x16 Slots:

pciex4 slot Keep in mind, the PCIe Expansion Kit uses any open x16 PCIe slot Let's say your current setup has 5 free x16 slots, that means you can