Athlon XP2600+TBred B(333MHz FSB) @200x12=2400MHz
Athlon XP1800+Palomino Unlocked and @166x10=1666(I think)
Athlon 650MHz(Stock)
Yes, they are all functioning, and actually all running in the same room. Also have an old K6@400, a Pentium 100 and a Pentium 75 lying around here someplace, unused of course. I also have an old 8088 computer(my first) that still runs in the basement. It's pretty useless for anything other than maybe running the dot matrix printer that is next to it.
I wish I sold this stuff when I upgraded, but could never bring myself to it, so now it just sits here, waiting for the fatefull day it is finally put to rest, or even put to work again.