This quad port PCIe 10/100/1000 Mbps Gigabit Ethernet Network Adapter Card provides four Gigabit Ethernet ports and is fully compatible with IEEE 802.3/u/ab standards.
Suitable for any PCI Express x4 enabled client, server or workstation, the Gigabit Ethernet Network Adapter Card supports high performance four channel networking and maximum data transfer speeds up to 1000Mbps in each direction (2000 Mbps total) - up to ten times faster than 10/100 Ethernet.
Compatible with a broad range of operating systems, including Windows 2000, XP, Vista, 7, Server 2003, Server 2008 R2, WinCE (4.2/ 5.0) and Linux (Redhat Enterprise, SCO, FreeBSD, etc...), this high quality PCIe Gigabit NIC is suitable for many SMB and Enterprise applications and is backed by a StarTech.com 2-year hardware warranty and free lifetime technical support.
Just the thing for virtual server host11/28/2010
Needed extra network support for a server hosting a handful of vms, and this card was 2 or three times less expensive than offerings from Intel, Broadcom and others. It installed in way under a minute in a Dell ProEdge T310 server, and installing Windows 2008 R2 Standard recognized the card and installed drivers automatically. I have not bothered to run any real performance testing on these NICs, as there are not heavy loads on my vm servers which are maily for testing. In a production environment, with heavy use, it would be worth investigating if you sacrfice peformance for price. If same level as those pricy cards, then this is a real bargain. Did have one transient issue. I first tried using Hyper-V Server Manager, and it did not recognize the card when I installed the hardware nor could I get it to recognize the drivers (which W 2008 R2 did). To work around this, I think but have not tired, install W 2008 R2 Core instead of Hyper-v Server Manager.
Works as promised9/6/2010
I bought it for my hackintosh. Works as promised. Natively recognized by 10.6.4 as 4 x Realtek 8169 by the AppleRTL8169Ethernet.kext. Also automatically recognized by Win 7 Ult 64 bit without need for driver CD. Buy.com does not mention MAC OSX compatibility but the startech.com website does.