game over... man, game over!!!

7447 isn't available at 1.7GHz only the 7448 is available at that speed.

7447 up to 1267MHz
7447A up to 1420MHz
7448 up to well atleast 1.7 GHz apperantly

a 7447A at 1420MHz will demand more W than a 7448 at the same clock.

the 7447 demands at 1267MHz 18.3 w the 7447A demands 18.0 w at the same clock.

the 7447 is at 1000MHz rated as 14.8W-21W
the 7447A is at 1167MHz rated as 9.2W-13W

so for a new CPU Card my opinion is that it is from a price/performance/watt viewpoint
better to go for a dual G4 (7447A) at ~1.2 GHz (1167 MHz) since this would'nt demand any more power consumption than a single 7448 but deliver more power (And probably cost less).

and the pegasos shouldn't have any trouble to keep up with the CPU's etc. morphos 'just' needs SMP support