This SFF-8643 PCIe 4X adapter is designed for connecting the high performance 2.5" NVMe U.2 (SFF-8639) SSD to a PCIe 4-lane slot in a system via a SFF-8643 cable. The U.2 SSD could in loaded onto a backplane that has the SFF-8643 connector to interface with Adapter, allowing the U.2 SSD to be used like a drive cartridge.
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Illustration of connecting the 2.5" NVMe U.2 SSD via a SFF 8643 cable
Note: The 2.5" NVMe U.2 SSD and the SFF-8643 cable shown above are for illustration purpose and are not part of this converter.
NVMe SSD installation: