Bifurcated PCI Express x16 Riser Card for PCIe 3.0 to SFF-8643 connector. It connects to NVMe SSDs or PCIe connectors via SFF-8643 connectors. This card requires that the motherboard supports BIFURCATION MODE of PCIe slots (16x to 4 times 4x).
Compatibility:
Supports all current 2.5" U2 SSDs or other NVMe SSDs.
PLEASE NOTE: YOUR MOTHERBOARD MUST SUPPORT “BIFURCATION” MODE OTHERWISE ONLY ONE SSD WILL BE DETECTED. You need a bifurcation like 16x to 4x 4x 4x 4x. For PCIe 16x port.  
Specifications:
PCIe 16x 3.0 (possibility of use on older PCIe standards, but the throughput will be lower.
SFF-8643 miniSAS connectors on PCIe card, connection to NVMe SSD via SFF-8643 / SFF-8639 cable (NOT PROVIDED).
The operating system must support U2 SSDs (Win 10 recommended).
ATTENTION: Not all BIOSes support U.2 drives which are in NVMe format, you will need a BIOS with UEFI and NVMe support.
Compatible with all U.2 SSDs or other 2.5" NVMe SSDs using the SFF-8639 interface.
Does not require a driver, works transparently to the operating system.
The PCIe card is supplied with high profile bracket and low profile bracket.
WILL ONLY WORK ON MOTHERBOARDS WITH “BIFURCATION” MODE.
Dimensions 69mm x 147mm, weight 76g. Optimal operating temperature 5 to 50°C.
Bifurcated PCI Express x16 Riser Card for PCIe 3.0 to SFF-8643 connector. It connects to NVMe SSDs or PCIe connectors via SFF-8643 connectors. This card requires that the motherboard supports BIFURCATION MODE of PCIe slots (16x to 4 times 4x). PLEASE NOTE: YOUR MOTHERBOARD MUST SUPPORT “BIFURCATION” MODE OTHERWISE ONLY ONE SSD WILL BE DETECTED. You need a bifurcation like 16x to 4x 4x 4x 4x. For PCIe 16x port.   PCIe 16x 3.0 (possibility of use on older PCIe standards, but the throughput will be lower. SFF-8643 miniSAS connectors on PCIe card, connection to NVMe SSD via SFF-8643 / SFF-8639 cable (NOT PROVIDED). ATTENTION: Not all BIOSes support U.2 drives which are in NVMe format, you will need a BIOS with UEFI and NVMe support. Compatible with all U.2 SSDs or other 2.5" NVMe SSDs using th Recommended products Provided by PCIe 3.0 16X Card For 4 SSDs U.2 NVMe (U2 NGFF) Or 4 PCIe X4 Switch Ports View product PCIe 3.0 16X Card For 8 SSD U.2 NVMe (U2 NGFF) Or 8 Ports PCIe X4 Switch Card View product KALEA-INFORMATIQUE PCIe x16 PCIe 3.0 Card for NVMe U.2 SSD or SATA SSD View product Pcie 16x Pcie 3.0 for 4 Ssd Pcie Nvme U.2 U2 68-Pin Sff-8639 Bifurcation View product Adapter Controller Card 2U for SSD M2 NVMe - PCIe 16x - Radiator View product PCIe 4.0 Controller Card 4 Ports SFF-8654 8i For 8 NVMe SSDs View product Pcie 3.1 16x Controller Card for 4 NVMe M.2 SSD - 4x M.2 NGFF - ASM2824 View product KALEA-INFORMATIQUE PCIe 3.0 16x Card for 4 M.2 NVMe SSDs M Key (M2 NGFF) ASM2824 View product