The intel controller also has 2 sata6 ports(white ports), so you can both use the sata6 and disable the marvell controller(and the jmicron).
Personally, I disabled Marvell, Jmicron. 1394, Serial and everything else I didnt use. Also had the Audio disabled until my Asus Xonar D2X went haywire and stopped worked. So I'm running on the HD-audio until the Xense arrives.