The red IDE is the only one you can use for raid, however, if you have any SATA hard drives you can also cofigure them in a raid array, using the red SATA connectors. I think ASUS motherboards require you to load the RAID drivers during your OS instalation! You will also need to enable the promis Raid in the BIOS! If you want to use 2 chanel Raid you will need a controller card! A good one can be expensive, and a cheep one can hose your system! I think Raid can be very unstable! I've gone to using 2 western digital Raptor SATA 150 hard drives (5.3ms seek time, 10k rpm's)!