Welcome to LQ!
I just read over your Mandrake problem and haven't a clue
Anything odd about your MOBO that you can tell us about? The thing that keeps buggin me is that you don't have any problems with getting RH on there though. SCSI drives? Any chance you could swap in another video card and try it?
Maybe it's just that Mandrake is such a rocket compared to RH that it heats it up too quickly
Good Luck, hopefully someone'll be able to suss out some options for you (Finegan? Aussie? ).