For Test #2, I used a seperate, dedicated Enermax 330w power supply for the 72w peltier. Used an Antec PP403x power supply to power the fans. For each test, I suspended the heatsink away from any blockage of airflow, installed adequate amounts of thermal compound, and placed the heatsink under load. Final cold-side temperatures were taken when a stable cold-side temperature was reached. Each was allowed to sit for 10 minutes to achieve a stable temperature, and temperatures were measured at this point. Measurements were taken with a Raytek Raynger ST digital Infrared temperature gun at roughly 1cm from the surface of the coldside. Take a glance at Test #2's results.
Table #2 confirms the conclusions of the first test very clearly, and brings in the Thermaltake SuperOrb for comparison. The JMC heatsink is clearly out of it's element here. At -3.5c, it came in dead last by a large margin. Next up, but certainly not a slouch, is the FC-PAL28, my own personal heatsink, at -17.9c. The SuperOrb is next, at an indicated -19.4c, which is an excellent showing for the (most likely, as I still have no real-world prices on the JMC) next-to cheapest heatsink in the roundup. The Alpha PEP66T comes in next, with a rock solid -23.6c. Decimating those around it is the OCWarehouse Ofrio at -32.7c. A more massive design, full-size copper baseplate, and the Delta38cfm fan combine to make this one the champ in this roundup. So...What is there to conclude?
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