A Quad Liquid cooled PowerPC…
Well i can only say i never got this machine running good. It gives artifacts in the OS but the cooling is ‘cool’. Even tried other CPU units. But it still gives artifacts.
Tho i cleaned the cooling system and replaced the hoses with clear-see-through hoses. So you can see if there is air in the system.
The pump was broken but i had a second Quad system that was DOA (which i robbed the cpu’s off) and one of the Pumps (that was a older system with two delphi pumps).
My only guess is that the pumps do not have enough debit to cool the cpu’s.