I've been running two 80GB Western Digital hard disks on my nForce 2 mainboard in RAID 0 for about three years now. I decided to go that route because I had heard it could bring up to a 20% speed boost. They're running on an on-board RAID controller which is software based with no on-board RAM like most enterprise grade controllers.
I am planning a pretty significant upgrade and this time around, I'm more concerned with keeping the system quieter and cooler so it isn't like having a second furnace in my small office. I've been reading several articles that say particularly with new 16MB cache drives, software RAID 0 gives almost no noticeable increase. Obviously, having one hard disk instead of two will significantly cut down on heat. I don't want to spend the money on a hardware RAID controller so I'm wondering if you guys think that software RAID 0 is worth doing or if I should just get a fast single hard disk?