Hello,
Please look at my initial post at the top: ENTER BIOS > POWER > THERMAL. There you can 'add' fixed value to PWM, so all works with faster RPM. I tested it and it works as expected in 70%, abut also I described that in initial post, including photos from scopemeter.
I have seen your post about 'ghetto mod'. So now I understand why You wrote, that my 'noctua plan' will not work, as it seems with older stations XW.... they worked too slow. In my case its opposite, they still work too fast.
According to what I was able to find, there was never stock fan for Z400 chipset. And 'yes', when we are talking about chipset temperature or fan, we think of 'memory', how it's presented in BIOS. By the way it's just bug, even if BIOS is downscaled from Z400. But I can forgive, as long as it accepts X56xx family.
My Noctuas arrived and I'm during experiments. I will come back with results, I almost found cooling scheme of Z400.
