Here is my situation. I currently have my Seagate hooked up as my OS drive, and my Maxtor (both in specs) is sitting unused in my computer (mainly because videocard blocks my last SATA port). Once that port is available, I want to set up a RAID 0 array with the two hdds. I have a few questions about compatability though. I know that since one is a 320 and the other is a 200, that the array will mirror the 200, but that is fine with me. My main concern is the transfer speed of the two drives differs (Maxtor is 1.5 and Seagate is 3.0). I do not believe that my Seagate is currently running at 3.0 (SATA 1 cable I believe), but I would like the array to run as fast as possible. Correct me if I'm wrong, but won't this default the array to 1.5? Would I see more of a difference from this, or if I hooked my current Seagate up with a SATA 2 cable and went to 3.0? According to Vista's Performance Index, the current primary is rated to a 5.6, but I would like to improve that. Any other setup suggestions?