Nice write-up and report! Always fun to read such user reviews. Yea, my main beef with itx.. has always been that air flow issue which is not always so straight forward to solve
I think I may have solved the problem.
Firstly, I ordered an ID Cooling IS-50, because big fan = less noise = better cooling?
Annoyingly, the IS-50 came bent downwards out from the box. Oh well, it's a $25 Chinese hsf... Wooden ruler and some wedging of plastic cards below it to spread it back to even level.
And installed, and since the mounting system is so flimsy, I managed to dodge a fitment issue with my extremely tall Corsair rams.
By pushing it all the way to one end of the mounting holes, I managed to achieve 0mm clearance between the heatsink and the ram.
Initial test: Horrible. The IS-50 fan was silent, but the Corsair continuously ran at high speed and the temperatures were almost the same as using the stock cooler.
And just to experiment with a reverse airflow: I flipped the fan and added 1mm metal shims to lift the fan from the heatsink to avoid the blades rubbing the heatsink
And boom, this weird configuration strangely worked wonders. With ambient at approximately 25 deg.Celsius, it can sustain full load for one hour+ without the case fan ramping to full speed.
IS-50 fan speed: 600-1575RPM
System fan speed: 500-1997RPM
AOD Thermal margin: Idle - 51 deg.C Load - 24 deg.C
HWMonitor: Idle - 29 deg.C Load - 59 deg.C
Satisfied. Stupid 100W ITX build, complete.
