to what i recall - the Marvell controller and the Intel controller are two seperate controllers. the one you see when you first built your computer (to my knowledge) is the Intel controller. i personally just use the intel controller sense when i got my board the marvell controller was a bit off but i also haven't tried the new drivers either. you'll just have to decide which you want to use... although the marvell controller for our board is SATA6 ready where as the intel controller is not.
as for installing windows, yes you'll have to as setting up raid requires erasing all data and sync'ing both drives together. Raid 0 is your performance buster.
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for an update on stability...
cranked
4.672ghz LinX 21 pass stable at full 12gb mem at 1866 and 2x uncore (3733) 101.2Gflops
http://i3.photobucket.com/albums/y71...us/jackpot.jpg
daily
4.272ghz LinX / Prime95 stable at full 12gb mem at 1866 and 2x uncore (3733) 93.1Gflops
http://i3.photobucket.com/albums/y71...lus/daily1.jpg