Urgent update! I may have to disassemble the COSMOS after some testing I did this evening with a Boreas unit.
While the water cooled COSMOS does an admiral job @ 4.5GHZ, the temps are a tad on the warm side when taxed. When running the "Checkers" benchmark for 3-1/2 hours the core temps would spike in the low 70's.
Testing the Boreas on the torture rack I was astonished...temps were cut literally in half! I am 2-1/2 hours into the benchmark atm and the core spikes are at 52c/49c/52c/46c @ 4.5GHz, 1.43 vcore, 1.37 vtt. Doing a little Elmer Fudd dance here if you can picture that...
I have nothing optimized yet, and I am ready to swear off water for good. Stay tuned for more updates.