Amazon.com: Dual-Port PCIe X4 Gigabit Network Card 1000M PCI Express Ethernet Adapter with Intel 82576 Two Ports LAN NIC Card for Support PXE SR-IOV for Windows/Windows Server/Linux/Freebsd/DOS with Low Profile : Electronics
Why Are the PCI Express Ports on My Motherboard Different Sizes? x16, x8, x4, and x1 Explained