The graphic card blew up a few years ago so I'm using onboard graphics.  And the hard drive failed last weekend.  I don't know about the other parts. I think the power supply was only 400 watts, maybe less.  And I don't know about the fans.  The DVD drive still seems to be ok. I haven't had trouble reading or writing disks.  Good idea about the RAM. There is only 2 gigs though.  So I don't think there is much there to salvage.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi