The additional USB 3.0 comes via a pair of Etron EJ168 controllers. While USB 2.0's 480Mb/s maximum bandwidth was enough for many years, USB 3.0 expands the bandwidth to a whopping 4.8Gb/s (4800Mb/s) which is more appropriate for today's large mass storage devices, so it's nice that this board has (8) USB 3.0 ports. Gigabyte also boosted the electrical capabilities of the F_USB1 USB 2.0 header (above, white with red text inside) to support charging requirements of peripherals like the Apple iPad/iPhone while the rest of the computer is off. This board supports USB 2.0 power demands up to 1500mA via 'On/Off Charge'.

Six native 6Gb/s SATA III ports (RAID 0,1,10,JBOD) are supplied via the AMD A75 chipset. Five SATA jacks are present on the board and one is located at the rear I/O for eSATA devices.

AMD A75 Northbridge

The AMD A75 chipset is cooled by a small passive aluminum heatsink, this chipset communicates with the AMD A8 Fusion APU over a Unified Media Interface (UMI) interface at 2GB/s.

Gigabyte's GA-A75-UD4H motherboard has four 1.5v DIMMs which supports up to 32GB of DDR3-1066/1333/1600/1866 memory in a dual channel configuration. If used, the AMD Radeon HD 6550D IGP will allocate up to 512MB from system memory to itself.

A simple passive heatsink cooling the boards' VRM circuitry and power MOSFETs. Only solid state capacitors are used to manufacturer motherboards these days. This Gigabyte motherboard uses Ultra Durable 3 components. With the upcoming AMD A85 chipset Gigabyte has upgraded this technology collection to Ultra Durable 5. The changes are pretty interesting, if you want to read about PCSTATS has a short article here from Computex 2012.