Hello, I currently have a 66.1GB 10,000 RPM hard drive. It is way too small to fit all the games I want on it. I am thinking about buying a second hard drive to use just for games and entertainment, while I keep the smaller one for work. I'd like a fast hard drive, but not so fast that I'll just be spending lots of money without even noticing the difference. My computer is fairly old. It is a duel core with a total of 3.6GHz processor, 2GB memory, and a 7950GT NVIDIA video card. I'm not sure what my mother board is... is that important for deciding on a hard drive? I've never purchased or upgraded my hard drive before (only video cards, sound cards, and memory), so I don't know what compatible issues could occur. Can someone please walk me through the process of choosing a compatible hard drive to add to my computer, if even possible? \ I was thinking I would set the second hard drive up so that upon starting up the compter, I'd have to select from the BIOS which hard drive to boot from. That way if there's ever a virus or anything from all the game related stuff I download for the newer hard drive, it can't cross over to the older hard drive. Is my understanding of how this works accurate? Thanks a ton for all the assistance!