Installing into an 8x PCI Express slot and complying with PCIe 2.0 specifications this 10Gb PCIe network card features two RJ45 ports for dual network connectivity - The network adapter card provides versatile Ethernet connectivity that supports five network speeds (10Gb 5Gb 2.5Gb 1Gb 100Mb) - The PCIe Dual NIC is compatible with both 10GBASE-T and NBASE-T networks supporting 2.5 and 5 gigabit speeds on CAT5e cabling and 10 gigabit speed on CAT6a - Standard and low-profile brackets included