AMD R9 390: ethminer no gpu device with sufficient memory was found

[Jonny125]

Hey guys,
I'm facing some issues with my ethminer which I am unable to solve.
I have an AMD R9 390 with 8GB of VRAM (should be enough for mining).
However ethminer tells me that there's no GPU with sufficient memory available.
I tried adding --opencl-platform 1 to my command line but that didn't solve the problem.
My internal GPU is deactivated as well.
Any hints on how to solve the problem and get ethminer running?

Thanks in advance
Jonny125

[Secullus]

Hi Jonny
What does the command "ehtminer.exe --list-devices" return ?
François