PCI Express - Wikipedia
R6970 MSI Radeon HD 6970 2GB 256-Bit GDDR5 PCI Express 2.1 x16 HDCP Ready Mini
Amazon.com: Gigabit 4 Port NIC with Intel I350 Chip, 1Gb Network Card Compare to Intel I350-T4 NIC, Quad RJ45 Ports, PCI Express 2.1 X4, Ethernet Card with Low Profile for Windows/Windows Server/Linux :
WGI210AT Intel I210-AT Single-Port 1Gbps PCI Express 2.1 Ethernet Controller
For Intel I350-T4 Quad Port Network Card with Intel 350 Chip PCI Express 2.1 X4 | eBay
SIIG 4-Port Gigabit Ethernet with POE PCIe Card - Intel 350 - network adapter - PCIe 2.1 x4 - Gigabit Ethernet (PoE+) x - LB-GE0811-S1 - Ethernet Adapters - CDW.com
AMD FirePro V5800 1GB GDDR5 128-bit PCI Express 2.1 x16 Full Height Video Card
AMD FirePro V5900 2gb GDDR5 256-bit PCI Express 2.1 x16 Full Height Video Card
XFX Radeon HD 6570 DirectX 11 HD-657X-ZDF2 1GB 64-Bit DDR3 PCI Express 2.1 x16 HDCP Ready Video Card - Walmart.com
NEW XFX Radeon HD 6670 2GB DDR3 PCI Express 2.1 Graphics Card HD-667X-CLF3 | eBay
Amazon.com: 4 Port Quad Gigabit Ethernet PCI Express 2.1 PCI-E x1 Network Interface Card (NIC) 10/100/1000 Mbps Realtek Chipset SI-PEX24042 : Electronics
Amazon.com: 4 Port Quad Gigabit Ethernet PCI Express 2.1 PCI-E x1 Network Interface Card (NIC) 10/100/1000 Mbps Realtek Chipset SI-PEX24042 : Electronics
Supermicro 2-Port 10 GbE PCIe 2.1 Adapter Card AOC-STG-I2T B&H
A Simple Instruction of PCI Express
Difference Between PCI Express Gen 1, Gen 2, Gen 3, & Gen 4 – DESKDECODE.COM
SIIG LBWR0011S1 IEEE 802.11ac PCI Express 2.1 x1 - Wi-Fi Adapter - Walmart.com
HPE 366FLR 665240-B21 1Gb 4-Port PCIe 2.1 Network Adapter for G10, Wholesale 665240-B21, Price 665240-B21
PCI Express - Wikipedia
Amazon.com: AMD FirePro V7900 2GB GDDR5 256-Bit PCI Express 2.1 x16 Full Height Video Card with Rear Bracket : Electronics
Amazon.com: I/O Crest Single Gigabit Ethernet PCI Express 2.1 PCI-E x1 Network Interface Card (NIC) 10/100/1000 Mbps Realtek RTL8111F Chipset SI-PEX24038 : Electronics
Delock Products 89013 Delock PCI Express x4 Card to 1 x internal NVMe M.2 Key M with heat sink and RGB LED illumination - Low Profile Form Factor
AMD FirePro V5800 1GB GDDR5 128-bit PCI Express 2.1 x16 Full Height Video Card with Rear Bracket
I210T1BLK, Intel I210-T1 - 2.5GT/s, PCI Express 2.1 | EET
Syba 4 Port Quad Gigabit Ethernet PCI Express 2.1 PCI-E x1 Network Interface... 810154013104 | eBay
Refurbished: AMD FirePro V7900 2GB GDDR5 256-Bit PCI Express 2.1 x16 Full Height Video Card with Rear Bracket Workstation Graphics Cards - Newegg.com
