Product DescriptionPerformance-driven and fully-loaded, the Thunder n6650W (S2915) offers the very best in 2P motherboard technology. Built for high-end workstation AND high-end server applications, the S2915 supports dual AMD Opteron 2000 series processors, and includes a number of integrated features such as dual Gigabit Ethernet ports, 1394a FireWire, Audio, USB 2.0, and support for multiple PCI Express x16 graphics cards - up to four (4) can be installed at once! Other features include PCI-X, SATA2/3G with RAID, SAS, and much more, all in an eATX (12' x 13') form factor.