The problem is that even if you mine at subzero temperatures and the miner itself runs cool not needing high fanspeed, the PSU that's built into these still runs its fans flat out and they're those horrible little 40mm fans. Nothing can quieten that part down no matter how low speed you run the miner.
Yes, I know my M3s PSUs were awful. It'd be interesting to find a way to compare just PSU DB over a range of temps and wattage.