One of Gigabyte's first LGA-1156 motherboards in the micro-ATX form-factor, the GA-P55M-UD4 was previewed by CPU3D.com, revealing an upper-mainstream motherboard sporting all the essentials and a little more. The CPU socket is powered by a lavish 14-phase circuit, cooled by independent VRM heatsinks. The CPU is wired to four DDR3 DIMM slots for dual-channel memory. The expansion slots on this board include two PCI-E x16 slots (electrically x8, x8 when both are populated), one open-ended PCI-E x4 slot, and a legacy PCI slot. The P55 PCH provides five internal SATA II ports (blue), and one eSATA port on the rear-panel. An additional controller provides two SATA II ports (white) and the legacy IDE connector. 8-channel HD audio driven by Realtek ALC889A codec, one gigabit Ethernet interface, two Firewire ports in all, and 14 USB 2.0 ports make for the rest of the feature-set. It makes use of Gigabyte's Ultra Durable 3 construction. The GA-P55M-UD4 will be part of Gigabyte's first wave of LGA-1156 motherboards.