I have a Mushkin Enhanced Chronos Deluxe 120GB SSD that I just got. My motherboard (GA-P55A-UD3) has a Marvell 9128 SATA III controller on it. This is limited by its PCI-e 1x connection to a theoretical 500MB/s. With my SSD being the only thing on that controller and the SATA III settings turned on in the BIOS, I am getting around 300MB/s. I know these Marvell controllers aren't great, but shouldn't I be getting better than that? Does anybody have any ideas of why these numbers aren't anywhere close to the 500MB/s I should expect?