This board supports the new Phenom X4 and older AM2 series processors. The board Model name MA770-DS3 is based on AMD 770 (RX780) + SB600. It comes with 1 PCIe x16 and 4 PCIe x1 slots. The board supports 4 SATA II and 1 IDE port. On board you can find a 4 phase PWM, 4 DIMM DDR2-1066 slots. GbE and 1394 are supported. At the back, you can find audio ports, COM port, USB ports, GbE, S/PDIF output port.
SUPoX AK780U is based on AMD 770 + SB600 chipset. It supports the new Phenom with HT3 and older AM2 series of processors. There are 4 DIMMs supporting up to 16GB of DDR2-1066 in dual channel. On board are 2 PCI connectors compliant with PCI v2.3, 2 PCI Express (x1) connectors compliant with PCI Express Gen2 V1.0, 2 PCI Express (x16) connector compliant with PCI Express Gen2 V1.0.
Most of the board we have seen so far are either AMD 770 chipset supporting single PCIe 2.0 or AMD 790FX chipset supporting CrossFire X Dual 16X or Quad 4X. The AMD 790X chipset supports Dual PCIe x8 in CrossFire mode as opposed to Dual PCIe x16 on The 790FX.