might we assume you mean RAID 0?
yea dont bother, you wont notice a huge difference, plus you'd have to wipe the hard drives you plan on using in the array...
what do you install windows and all your games on external drives?
a single internal would be quicker in my opinion.
you're much better off getting RAID 0 with internal devices, not to mention i dont think its even possible to do with with USB devices.
haha you could get like 2x2gb flash drives, fast ones, and just set them up in RAID 0 and use it as a paging file... yea not gonna happen.