@bloodline
Really? I got the 603e@240 + 040@25 + SCSI which should be the hottest combination (esp with 040) and I havent seen anything like that happen...
Was your card in a desktop or tower?
As for 300MHz I heard some people had salvaged higher rated 603e's from old powermacs and managed to get them transplanted onto their cards.
Maybe Ponos is one of them?