M.2 NGFF Key M to PCIe 3.0 4X Extension Cable (90°Right Angle PCI-E Slot)
PCIe Gen 4 vs. Gen 3 Slots, Speeds
Ultra Compact Vertical Mount M.2 (NGFF) SSD to PCI-e Express 4X Adapter
Amazon.com: 2 Pack NGFF M2 to PCI-E 4X 1X Slot Riser Card, M Key M.2 2260 2280 SSD Port to PCI-e Adapter Converter Multiplier for ETH GPU BTC Mining with LED Voltage
PCI-E 1X 4X 8X 16X Female To PCI-E 16X Male Graphics Extension Connection Conversion Adapter Card Compatible with PCIe 3.0 - AliExpress
PCI Express PCI E 1X to 4X Riser Card Graphics Card Port Adapter Ribbon Extender Extension Cable PCIE Riser PCI-E Flexible Cable - AliExpress
motherboard - Physical obstacle plugging PCIe 4x into PCIe 8x - Super User