System x 4 x 2.5in NVMe PCIe SSD Backplane
Part Number: 44X4108
All standard models of x3950 X6 and x3850 X6 are shipped with four 2.5-inch SAS/SATA hot-swap hard disk drive bays. 1×4 2.5-inch NVMe PCIe Gen3 SSD Backplane (44X4108) is one of the internal storage expansion options.