49Y7993 IBM X540 Dual Port 10GBase-T Embedded Adapter by Intel for System x
Dell Intel Ethernet X540 DP 10GBASE-T server adapter – Total IT Resource
Intel X540 ML2 Dual Port 10GbaseT Adapter for IBM System x - network adapter - ML2 - 10Gb Ethernet x 2
Amazon.com: 10Gb PCI-E X8 Ethernet Converged Network Card Compatible for Intel X540-T2, Dual Copper RJ45 Port with Intel X540 Chipset, Ethernet LAN Adapter Support Windows Server/Windows/Linux/ESX/Vmware : Electronics