Pretty hard to tell, about temps, the dual fan ones were already just over 60c, and now I have the early Jan firmware installed, which lowers the fan speeds even more. I did run it a few minutes at 100% before disassembling it, and the old-working one would bounce on the table it was so unbalanced. So, really don't want those vibrations either way.

So, no science here. I have higher clock speeds, higher voltage, higher profit, and new fans on this machine, and the same temps. Could be firmware could be the fans. Either way it's now quieter at the same fan %. I'll re purpose the old ones for something one day anyways, like on a GPU miner, or in the crack of the window for exhaust.
And the one with the dead fan is now able to achieve 700 MH/s like the rest now.

If ordering those exact ones just be prepared to add a bit of wire length.

New problem:
I have trouble with chains not starting on the new firmware. Seems like they don't respond fast enough if they are cold. I moved them to ports 0-3 instead of 4-7 and it hasn't had that problem cold booting again. It's almost like it doesn't quite wait long enough for them to wake up.

I have room for 100 more miners, but inno sales team scared all my investors away. Anyone got a $400,000 loan laying around? :p