Pohjanmies on Nostr: I use two S9 on 450 Watt, replaced the PSU fan from the AW3++ PSU. Check this PDF ...

I use two S9 on 450 Watt, replaced the PSU fan from the AW3++ PSU.

Check this PDF from cryptocloaks. 
Might be usefull as it is a DIY-Manual.
https://www.cryptocloaks.com/the-future-of-space-heaters-s9-bitcoin-asic/#