This looks like the next dual socket 771 board:
Supermicro's 5400 chipset-based serverboard products support the next-generation quad-core Xeon 5400/5300 (Hapertown/Clovertown) and dual-core Xeon 5200/5100 (Wolfdale/Woodcrest) processors. With up to 1600 MHZ front bus speed, supports 128GB low voltage high performace 800 MHZ (1.5V) FB-DIMM memory, high bandwidth PCI-Express Gen. II slot capability, and new intelligent management support, these Supermicro server boards are ingeniously designed in various optimized models.
Specifications
Extended ATX Motherboard for Socket-771 Xeon Processors
Intel 5400 / PXH / ESB2 Chipset, 1066 - 1600 MHz FSB
8 x DDR2 DIMM Slots, Up to 64 GB FB-DIMM DDR2 Memory
Dual Independent Bus, Dual Channel Memory Architecture
Up to 21.3 GB/s Memory Bandwidth (w/ 4+ Modules)
2 x PCI Express x16 Slots, 1 x UIO Slot
2 x 133 MHz PCI-X, 2 x 32-bit PCI Slots
6 x Intel Serial ATA-II/300 Ports, RAID 0, 1, 5, 10 Support
Intel Dual Port Gigabit Ethernet, 5 x USB 2.0 Ports, IPMI, 2 x Firewire
OnBoard 7.1 Channel Audio
