I have DX58OG and I connected my Sata Drive to the Marvell 6 GB/s port. I installed the Marvell Magni Driver but when I rebooted my computer, it shows that my Sata Drive is connected to a 3 GB/s port. I have the latest BIOS, version 0888 (1/29/2012) with Marvell 88SE91xx Adapter BIOS version 22.214.171.1247. I have WIndows 7 (64-bit). Any suggestions?