So, today MageTank learned that just because you buy two powerful fans to run them in push/pull on a 120mm GPU AIO rad, does not mean you NEED two power fans in push/pull on a 120mm GPU AIO rad. A single Noctua industrial fan at 1600 RPM's was exactly the same as two, lol.
Still, dropped 10C from the stock EVGA fan (from 55C down to 45C) so that's pretty impressive. Next on the to-do list: liquid metal. My goal of sub-40C GPU is going to happen eventually.