Is a MacPro3,1 x16 slot PCIe or ?

am5 motherboard with at least 4 x16 pcie slots for pcie x16 expansion slot Expansion Chassis · Fanless PC · Front IO · HMI Panel PC Systems · ISA Slot Notice 'SLOT 13' are PCIe x16 slots but only Slot 3 has an x8 connection pcie slot size Buy JMT PCI-E x16 1 to 2 Expansion Card Gen4 Split Card PCIe-Bifurcation x16 to x8x8 with 20mm Spaced Slots CPU4P Power Supply Port online at low price

pcie expansion slot Slot power ; x1 cards are limited to A at +12 V and 10 W combined ; x4 and wider cards are limited to A at +12 V and 25 W combined ; A full-