Hey guys,
I have a rig consisting of 6 x RX 480s and I recently moved them to a rack where there is no HDMI display. When I set it to mine it starts mining, but the fans don't speed up what so ever, but because there is no extended display on one of the GPUs, I can not edit the fan speed (have tried the inbuilt fan speed setter thing and msi after burner). I have tried changing  Primary VGA (or what ever it was) to PCIE, however I just get a blank screen (so I unplug the GPUS to change it back to the IGPU).

My questions are:
- Why can't I set the fan speed
- Why can't I set Primary VGA to PCI E without just getting a blank screen.

My Rig has:
6 RX 480s
4GB ddr3 ram
Asrock H81 pro btc
1600 w PSU (yes ik it's overkill)
powered pci e risers

Thanks

Edit: I just found HDMI Emulators, I think these would work. I would buy this if there aren't any other soloutions.
For those interested: https://www.amazon.com/CompuLab-fit-Headless-Display-Emulator/dp/B00FLZXGJ6