Gigabyte LGA1156 4DDR3-2200 CrossFireX/GBE/Raid/SATA3/USB3.0/7.1-CH ATX Motherboard GA-P55A-UD3 Backwards compatibility with USB 2.0 assures users of long term use of their legacy USB 2.0 devices The Gigabyte P55A-series motherboards support the SuperSpeed USB 3.0 technology made possible through an onboard NEC uPD720200 host controller Dedicated lower resistance fuses ensure lower voltage drops, and provide more stable and plentiful power delivery