4 x 4 slot ✓ Flex 1U4 Rackmount Thunderbolt + PCIe Slot (Softraid for

4 x 4 slot The number after x tells you how 2 NVMe slot requires 4 PCIe lanes, and as a result, the smallest one available requires a x4 PCIe slot 4 x 4 slot Add 4 Internal SATA III ports to a computer through a PCI Express x2 slot ; 1 x HDD + 2 x SSD HyperDuo , MBs, 2 TB ; Drives Used: SSD:

4 x 4 slotPart #:, PCI4-AD-x4M2-04-G4 User's Manual: PDF Description: Gen4 PCIe x4 slot

4 x 4 slot PCIe was introduced in 2003 as a replacement for the older PCI, PCI-X, and AGP standards x4 slot = 4 lanes; x8 slot = 8 lanes; x16 slot = 16