You should check out Optimum Tech's video "Ultimate NCASE M1 Cooling Setup?" in which he compares the A9 and B9 fans on the NH-U9S, set up with intake from the rear and the window side panel.
yeah 5 degrees cooler on the A9s (doubt i'd get 5.0Ghz on mine), Hoping to use the bottoms as intake and rear as exhaust in mine.
He set the fans to 100%. Literally nobody does that. Of course the a9 wins because it spins 400 rpm faster.
IDK about yall, but I sure as hell don't need 100% fan speeds and I'm cooling a 10 core.
i def dont want no 77C temps, prefer to lower the OC and fan speed. Whole reason i'm moving to the m1 is for a smaller and better cooling build.
really wish my gaming x would fit in the m1 it runs silent most of the time.