jepp, there is no problem if you dont´t mind the noice...

In the end i installed a fan-simulator and plugged the fan into an other Z9 mini

The only one on bitmain homepage:
Antminer-Z9-Mini-NAND-500M-201808311812.tar.gz

I tried both, keep settings and also unchecked it.
Did it several times and tried every combination.

the only tiny success:
installing batch 2 firmware --> change to turbo --> keep settings ---> install original firmware
Result: 550 frequency + working temperature sensor + working fan

sadly this trick does not work with batch 1 firmware and (e.g.) 650 frequency.
Keeping setting and reverting to batch 3 firmware resets the frequency to 500.

Hi,

it works just fine with the original firmware, so the fan cables are not the problem (nevertheless i checked it and also switched to the second connector).

I tried batch 1 firmware (the one you mentioned), result ----> works, stable overclockable until 681
BUT:
Chip temperature always reads: 0
Fan always spins at 100%
Changing it to 50% works for 10sec then back to 100%

Also tried batch 2 firmware, same results.

I also tried to unplug the fan while the miner was running and connect it to the 2. fan connector of a other Z9 mini but it stops working the moment i unplug the fan.

i have got the same problem with my batch 3 mini.
Once i install an other firmware the temperature sensors dont seem to work and the fans always spin on 100%.

Does anyone have the same problem and does anyone have a solution?

Thx!

Hallo zusammen,

bin auf der Suche nach einem schönen Keller / Garage / Ecke im Thurgau für 2 GPU Rigs.
Rig1 verballert ca. 1600 Watt, Rig2 zieht ca. 1700 Watt aus der Wand.
Würde mich freuen wenn wenn sich was finden lässt. Wegen Miet/Stromkosten reden wir dann.

Standort vorzugsweise Kreuzlingen und Umgebung.
Und ein 3. Rig ist auch schon in Planung.

Gruß!