not using all GPUs at the same time on windows 10

[imirzadeh]

Hi
I have 4 x AMD RX470(4GB) GPUs, running on winodws 10
ethminer knows all the gpus when I run ethminer.exe --list-devices but when I run and monitor gpus, it only shows 2 gpus are busy at the same time and not 4 !
first gpu1 and gpu2 are busy and gpu3 and gpu4 are idle then gpu3 and gpu4 are busy and gpu1 and gpu2 are idle and .....
What can I do to use all my gpus at the same time?
ethminer version => tested 0.10 and 0.11
Radeon Settings Version => 2017.0424.2119.36535
Driver Packaging Version => 17.10.1731-170424a2-313745C-CrimsonReLive
OpenCL™ Version => 22.19.162.4

[imirzadeh]

also this is odd for me,

[derubm]

try the latest dev version.
#152

[roninkaizen]

@nodet07 i would try to parallelize the process,
as you start device 1 and 3 together, and start afterwards with the device 2 and 4 you should come to a running solution, i am also still testing, but change to the process as mentioned brought a running miner using 4 gpus instead of 2
i am aware, that this is not a solution but a workaround 8-)

[YanBellavance]

I had the same issue
This seems to be a OS issue not the miner because in my case:
nvidia-smi reveals the OS does not see all GPUs

[DeadManWalkingTO]

Last build believe works fine!

[DeadManWalkingTO]

OpenCL Hardware Test Launch Command:

ethminer -RH -G -S eu1.ethermine.org:4444 -FS us1.ethermine.org:4444 -O 0x7013275311fc37ccc1e40193D75086293eCb43A4.issue194

Try with latest Ethminer version and feedback please.
Thank you!