Like the ASUS offerings, Gigabytes best of breed motherboards for AM2 will feature NVIDIA’s nForce 590 SLI chipset. The M59SLI-S5 has dual x16 PCIe graphics, dual eSATA ports, dual BIOSes, ten USB 2.0 interfaces and eight SATA 3.0Gbps interfaces. One UDMA PATA interface is provided for legacy optical storage devices. Like other nForce 590 motherboards, the motherboard also features dual Gigabit LAN but over the Marvell Gigabit PHY. Gigabyte has two Firewire-400 headers on the motherboard with an additional third interface on the rear I/O panel.
Their S5 motherboard looks interesting, mainly because it has three PCI-E graphic card slots. Ones only an 8x, and would be suitable for single card configurations. For a lot more info on all the new boards, check out the posting at DailyTech.