Introduction to PCI Express (withdrawn product) > Lenovo Press
Amazon.com: GODSHARK PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4, x8, x16
Amazon.com: REDLUX PCIe 3.0 to NVMe (4) M.2 Adapter for M.2 (M Key) SSD, X16,Compatible with PCIe 3.0 Motherboards and Backward Compatible with PCIe 2.0 and PCIe 1.0 : Electronics
PCI-Express 4.0 x16 1 to 2 Expansion Card Gen4 Gen3 Split Card PCIe-x16 to x8x8 | eBay
NVMe to PCIe Adapter x16, RIITOP M.2 NVMe SSD to PCI-e 3.0 x16 Adapter