NVME M.2 SSD M Key to PCI-e 3.0 x1 host controller expansion card, supports M2 NGFF PCI-e 3.0, 2.0 or 1.0, NVME or AHCI, M-Key, 2280, 2260, 2242, 2230 SSDs low profile bracket - Newegg.com
Amazon.com: IO Crest 2 Port Serial PCI-e 1.0 x 1 with Full and Low Profile Brackets SI-PEX15037 : Electronics
PCIe Parallel Expansion Card PCI Express 1.0 x1 to 1 Port Industrial DB25 25 pin Converter Adapter Controller for Desktop PC - AliExpress
Amazon.com: 2 Port Serial DB9 RS232 PCI-e 1.0 x1 with Low Bracket SI-PEX15055 : Electronics
Peripheral Component Interconnect - Wikipedia
Introduction to PCI Express (withdrawn product) 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
PCI Express 1.0 < Technical Information < 뉴스 | HIS 그래픽 카드
PCI Express 1.0 vs 2.0 or greater for overclocking and general performance | Overclock.net