It's been quite awhile since I got this computer, and we are in the process of assembling the bits so my husband can put together a new one for me. Curious, I had him check the records for when I got this. 2003. It's done well, outlived two printers and four monitors, two UPS systems and several CD drives. In the winter it makes growly noises if the room is too cold when I turn it on, and there is a hum thats loud enough to be annoying (like whispering in the next room) and also leaves a ringing in my right ear by the end of the day.
'Tis time, I'd say.