The way I fried my BPPC card.

[Lemmink]

If you have a 060 PPC you might get away with only pouring power into the system at one point. If you have an 040 PPC you absolutely must put extra power to the system via the floppypowerconnector of the A1200 board.
Is sure look ugly as hell haveing an extra powercord going into the machine through a crack in the desktopcase, but thats the only way to get a stable system.
So better put it in a Tower anyway.

[Lemmink]

Belive it or not but since the BPPC draws way more power then the A1200 expansion connector was originall build for you just have to give some extrajuice to the board via the floppypowerconnector.  On the way from the A1200 Powerconnector to the expansionconnector some power is lost, depending on the shape the board is in it will be more or less.
Feeding power to the board by two ends increases the amount of power that actually reaches the expansionconnector.