Quote from: fanatic26_ on August 30, 2018, 11:49:58 PM

What exactly is the purpose of adding a second fan other than wasting electricity? Even overclocked these things pull a hair over 400 watts and dont put much heat out at all.

I dont get it?

Depends on your setup and where you keep the Antminer(s).
The main reasons for me are heat extraction and noise reduction because I live in a one-room apartment running several Antminers in soundproof boxes.

If you attach a hose to Z9 mini without an extra exhaust fan, the intake fan would have to run at max fan speed most of the time to be able to keep the Temp(Chip) under 85.