For a first build, plug the monitor into the motherboard first if your CPU has graphics, get into BIOS, and only then move the cable to the card. Removes one variable from the very first power on and saves a lot of second guessing.
He said each stick boots fine alone in the same slot, which is the test that rules that out. A dead stick doesn't get better when you reseat it.
Filmed it and there is a visible shift to the right coming up. Pretty obvious once you look for it.
212W sustained. So the cooler is doing its job and I've been worrying about the wrong number for two weeks.