Asus PEi-10G/82599-2S , pci-Express 2.0 (8x) Dual-port 10Gigabit lan server adapter - SFP+ optical LC or direct attach copper , Intel 82599Gb chipset - support AFT, SFT,VMLB, DCB, i/OAT, VMDq virtualization, DCA, SR-ioV , ALB , 5GT/sec - includes extra low-profile only for 2U rackmount or slim desktop - for selected ASUS Server/Workstation motherboards