This is my kind of thread.
I too have a thing for twins.
I recently started a thread about
waterless coolant to be used in liquid cooled Macs. IMO, keeping everything stock and simply switching to waterless coolant would resolve any and all non-mechanical issues. Read along to see what I mean.
Otherwise this is an interesting project. If the temperatures are the same then why did Apple resort to liquid? I read the part about the paste but in 2005 I assume the paste in the air cooled Mac was as good as in the liquid cooled Mac.
To our machinist: invariably in car cooling components it is taken for granted that tubular radiators are vastly inferior to flattened ovoid pipes. Flat pipes allow more air flow while exposing more surface of the pipes to air. The benefits are substantial. Your cross-sectional obstruction to flow is significantly less and thus allows a greater volume of air at sustained velocity and laminar adhesion (less turbulence). I can imagine that by flattening your copper through the fin stack you would need fewer RPM's to maintain the same or even better temps. Use of a rolling mill would be preferred if the copper is merely solid. You could use thinner copper cores and have equal surface area to your current tubes once flattened.
Photo here shows hollow pipe but the principle is the same for solid pipes.
Regarding SSD's: I just bought a bundle of SSD's from a rando on CL and chucked all three into the G5. They work exactly as expected and one is now my boot drive. Here is the specs and test results;
PowerMac 7,2 2.0GHz DP
OCZ Vertex 3 (boot drive) SATA 3: SR 90, SW 90, RR 86, RW 90
Samsung MZ-5PA2560/0D1 SATA 2: SR 90, SW 90, RR 70, RW 70
PNY CS1311 SATA 3: SR 100, SW 93, RR 84, RW 77