Version 3.0c. Fan control seems not to be working properly.
Environment:
Clean installation Windows 10 (1709), no updates.
Drivers - latest (18.6.1)
Card: single Asus ROG Strix RX580 O8G (stock bios, only timings modified)
No any additional software than can interfere with fan control is installed (like Afterburner etc.)

-fanmin 50
-fanmax 100
-tt 55

When miner starts - fans are initially stopped. When temperature rises to 50 and above - fans start working on max speed (maybe not max but high enough). In a few seconds temperature drops below 50 and fans begin to slowdown and finally stop. In a few seconds the sequence repeats.

Tried setting -tt -50 to force constant fan speed - not working.

At the same time it works on Asus Strix RX570 more or less properly. At least asjusts fan speed to keep temperature set by -tt.
I have compared bios bios fan settings for these two cards - they are identical.
It is incompatibility with this particular card or I am missing something?