ASUS P6X58D @ Bjorn3D

"The X58 chipset is currently the flagship of Intel's chipset line, but it was lacking a couple of key features due to its launch date. These where of course SATA 3 and USB 3. This is no longer true thanks to Asus. They have put a SATA 3 Controller onboard as well as adding two USB 3 ports on the back of the motherboard."