I tried my system both ways...
IC7-Max3 Board
2x 120GB SATA 7200 RPM 8MB Cache in Raid 0. I used 128kb stripes, which is too large. If I was to do it again, I would just down to 64kb.
Ran the same Drives in legacy mode, with 1 as master the other as slave.
Can't remember my exact scores, but there was a negligable difference between the two scores. I left them in Raid 0 to increase the size of my "C:" Drive.
If I was to do it over again, I would run them both in RAID 1 so that if a drive fails I just change my bios and keep playing.
Raid 0 right now isn't that much faster. It does have faster burst speeds, but practicle isn't much faster at all.
BTW, there is no such thing as "RAID Drives". It is a RAID Chip or RAID Card..