Has anyone managed to change the fan speed? I've applied "75" to the fan speed however it loaded default -1.

[GPU 0] T=-1C A=-1% sols=4.772
[GPU 1] T=-1C A=-1% sols=5.054
[GPU 2] T=-1C A=-1% sols=19.000
[GPU 3] T=-1C A=-1% sols=18.983
[GPU 4] T=-1C A=-1% sols=16.310
[GPU 5] T=-1C A=-1% sols=15.052
[GPU 6] T=-1C A=-1% sols=14.845
[GPU 7] T=-1C A=-1% sols=15.105
GPU 0: core=-1MHz mem=-1MHz powertune=-1 fanspeed=-1
GPU 1: core=-1MHz mem=-1MHz powertune=-1 fanspeed=-1
GPU 2: core=-1MHz mem=-1MHz powertune=-1 fanspeed=-1
GPU 3: core=-1MHz mem=-1MHz powertune=-1 fanspeed=-1


3 x RX480
1 x R9 390