Long story short,
Thought I had a bad hard drive so I bought two new ones, pull everything out and vacuumed the case and powersupply. Put it back and have this:
400W ps
Athlon XP 1500+
Epox EP-8KHA+ mb
Maxtor 80GB (brand new) drive master, channel 0
Maxtor 80GB (brand new) drive slave...