jrk373:Do I have to buy stuff? Can I just plug the old one into the MOBO?
sometimes you cannot. I'm working on a box right now [for myself for a change] and the new PSU designed for small form format is from a dell, and it has ONE 4-pin molex connector...that's right one. the optical drive was a slim-hight laptop style and powered with a floppy connection. y-cable on order.....should get it today I hope.
point is you need to check that you have a power connector for 2 HDs and an IDE cable with 3 connectors [one for mobo and two for HD's, though if you won't need the optical drive during this, you can use those power/data connections,] as sometimes the MFRs like to save a buck and do not give you what you won't "need."
Tallon41