since i have broadband i have been leaving my comptuer on almost all the time. i do turn the screen off when im not using it though, but will this be causing other problems- im thinking in terms of over heating it. i have a gigabyte AGP 8x cooling fan, will this be good enough to keep the pc cool. if not can someone please suggest me a new one to get, and give me a bit of background info on them ie. what size/speeds they come in and good brands. thank you