In my other post regarding HDD jumper settings I mentioned the WD6402AAEX drives I'm going to be using in RAID 0. I originally bought these thinking that using SATA 6Gb/s on the Marvell controller would be an improvement. But nearly everything I read now tells me that this is not the case. I'm better off using the ICH10R controller for the array and sticking with 3Gb/s. I know I can jumper the drives to run as 3Gb/s drives. I bought 3 of them (one for a spare which I always do in case of failure). They were around $80 each (USD). So it wasn't pocket change and I cannot return them as they have been opened. But now my question is this: Will I get the same performance out of these jumpered to run at 3Gb/s as I would get with a pair of WD6401AALS drives that are made for 3Gb/s? Or is it going to be a little slower?