AIO pump and ASUS Prime B550M-A WiFi II

[directino]

Long story short BIOS often won't detect the AIO pump, won't give it power and the CPU overheats in a minute. 

It is connected to the CHA_FAN (no AIO pump slot on the MB) with DC manual - 100% if CPU temp over 0.

When pump is detected all works like a charm but if I shut down the PC and turn it on again often the pump is not detected and won't start.

Do you think it is a problem with the MB or the AIO? Any ideas how to solve it? 

Thanks in advance!

[Demoniacstar]

last i knew you just couldn't throw 100% if temp over o......just disable the Qfan settings all together for that fan header and it should run it 100% with out it ....i do know when messing with q fan settings and not set correctly in a step up step down config things will go goofy like that ......  

[directino]

The problem was with the AIO (kind of). Bought a new AIO and it works fine on the MB. I was thinking of returning the old AIO as faulty but tried it on another MB with dedicated AIOpump slot and there it works perfectly...