This site is really great and in fact pretty accurate.
It would be great if there is any option to convert it in other currencys like EUR € or GBP £ (maybe with the current exchange DOLLAR->EURO).

Antminer S9 13.5 TH Version, Januar Batch
Controller Board Modell 1.20

Hardware Version: 16.8.1.3
Logic Version: S9_V2.54
BMminer Version: 2.0.0

For me (my s9) its "First Fan Config".
The labels say fan6 and fan5 but the software shows fan6 and fan3.

I switched both plugs multiple times and try to "feel" the different with my hand on the output fan, so i figured out witch connector is for front/back, but thats just a guess 

I think this is the right way? Correct me if im wrong

If the out sucking fan is now set to 6000 and the in pumping one on 4000 and i just change both cable/connection ... the software will adress the right fans. 6000 to pump in and 4000 to suck out. Or do i think in the wrong direction?

Okay thanks a lot, i will change both fan connections.

Hello,

how are the s9 fans supposed to work?
If there is 100% fan speed is the "front" fan (sucking out the air) supposed to run at 6000+rpm and the back fan(under the ethernet port, pushing the air inside) at around 4000rpm? Or the opposite way?
I think the fans are wrong plugged in my case, btw. its the 13.5 TH/s model.

Greetings