Amazon.com: PCIe Gen3 x2 USB 3.2/3.1 Card ASM3142- PCI Express to 4-Port Type C HUB Internal Expansion Card Controller Adapter PCI Express Card Desktop PC Support Multiple INs : Electronics
5 Slot M.2 B-key SATA Base PCI-e 3.0 x2 Bandwidth Controller Card Require x16 Slot
ST 2P6GR-PCIE: PCIe x2 > 2x SATA, RAID 0 - 1 - span, JBOD at reichelt elektronik
16 Port SATA III PCIe x4 (x2 Bandwidth) NON-RAID Expansion Card - Newegg.com
Delock Products 90433 Delock PCI Express x2 Card for 4 x SATA HDD / SSD RAID
hardware - Force renegotiation of PCI Express link speed? x2 card reverts to x1 width - Server Fault
What is the difference between PCIe Gen 3 X2 and X4 SSDs? Can these two SSDs be used for laptops that support the PCIe interface? - Quora
NVMe PCIe x4 x2 M.2 NGFF SSD to PCIe x1 converter card adapter PCIe x1 to `US | eBay
DIP2X-D2X20 | PCI Express x4 (PCIe x4) to two PCI Express x2 (PCIe x2) slot | Expansion chassis | DIP2X-D2X20