PCIe to SFF-8643 Adapter Card PCIe 3.0 x16 to (4 ports)SFF-8643 for U.2 NVMe SSD | eBay
Amazon.com: 5 Slot M.2 B-Key SATA Base SSD PCI-e 3.0 x2 Bandwidth Expansion Card Require x16 Slot SI-PEX40142 : Electronics
Amazon.com: ADT-LINK Riser PCI-E 3.0 16x to x1 PCIe x16 x1 PCI Express Riser Mining Graphics Card Extension Cable R13SC 25cm with Power Line (No Power Cable) : Electronics
Can this configuration work on the PCIE slots? : r/pcmasterrace
Impact of PCI-E Speed on Gaming Performance | Puget Systems