I do have a Raid 0, and Operaguy has it right as far as I know. If you happen to have a motherboard that supports it and plan on a set of matching drives I think Raid 0 is about the cheapest real improvemt in computer performance you can have. You also don't loose any capacity, compared to the redundant RAIDs. The downside is, of course, that you are doubling the chance of failure over even a single drive, 4X the failure of two regular drives (where you only loose the one drive), an if they go you loose everything. Back up often! Don't buy Western Digital Drives! ;-) I'm up to a Pentium 3.2 now, overclocked to a little over 3.5, and it still isn't as fast as some of these guys, though. (190 seconds) And I've optimised my system every way I know, consistent with reliability.