rx480/580 memory clock locks at lowest state 300MHz

hello there,

i am using the unraid server (6.4rc-15e, 4790K/Z97/32GB) and passing through my amd rx480/580 gpu, use it for about 2 months now.

recently just notice that my rx480/580 memory clocks often locks at lowest state, which is 300MHz all the time since the windows starts.

of course it impacts the performance, especially for gaming.

it's easy to find it out.  just run gpu-z and start rendering test and check if memory clock jumps up.

i have a workaround, to use cru-1.3.1 to soft reset the display driver then the memory clock is back to normal, that means when gpu has workload, its memory clock up to 1750MHz.

but it seems i didn't have the issue before. yes, of course I updated the graphic driver to the latest recently but I never get the issue in the physical machine running on the windows 10.

does anybody have the same issue?

Best Regards,

alex