( for Back plane with SFF-8643 NVMe ports only ) -- ( not for SFF-8643 SAS/SATA ports) - 0.5m internal MCIO x8 to Straight 2x SFF-8643 miniSAS-HD ( NVMe) Cable - MCIO 8i 74pin Straight (PCIe 5.0) Connector - 2x SFF-8643 MiniSAS-HDD ( for NVMe/PCIe protocol only) Connector - ( for NVMe devices only ) -- the ports on Backplane have to be 85-OHM ports