HP Ethernet 1Gb 4P Gig 331T Adapter PCIE LFF+SFF Adapter 647594-B21 Type: Server Adapter Specifications: Network processor Broadcom BCM5719 chipset Data rate Four ports, each at 2 Gbps full duplex 8 Gbps aggregate full duplex theoretical bandwidth. Bus type Four lane (x4) PCI Express compatible with x4, x8, and x16 PCI Express slots Form factor PCIe Card Power 4.3W (1000Base-T, maximum traffic) 1.0W (AUX power with WoL) Server type supported ProLiant servers IEEE compliance 802.3, 802.3ab, 802.3u, 802.3x, Dynamic 802.3ad, 802.1Q, 802.3az, 1588, 802.1as Compatible operating systems Microsoft Windows Server 2008, HPC Server 2008,icrosoft Windows 2008 Red Hat Enterprise Linux 5.7 (AMD64/EM64T) Red Hat Enterprise Linux 6.1 (AMD64/EM64T) SLES 10 and 11 Oracle Solaris 10 VMware ESX and ESXi Microsoft Windows Hyper-V