This is my first G5, so, there are a couple things that I'm wondering about. The computer runs pretty warm. I haven't checked out how hot using a hardware monitor, but it feels like, it's producing a lot of heat on the outside. Almost to the point where it seems like it's making my room really warm. Maybe I'm being paranoid... or it's been a while since I've lived in Pasadena during the summer. Secondly, there is this little hissing noise thats coming from the computer. I've read around and have seen people mentioning a chirping sound, which doesn't really describe what mine is doing. Sometimes the hissing is sustained in little 1 or 2 second incrimints (sp?)... so that has me wondering. I've worked on a 2.0 at work for a little bit and have never noticed any of these things... my room mate also has one (a 2.0).. he's never mentioned a thing.. and I've never noticed it when I've used his machine. So yeah, any advice you guys can give will be appreciated.