After months of mining with Claymore (starting with 9.4) I noticed that the speed for each AMD RX580 fell down from 27.5 MH/s to 24.7 MH/s.
I tried newer versions (Claymore 10.0) or restarting the machine but it always mines with this 10% lower speed.
Hey Ruz05 i noticed on the new Radeon driver there is a setting where you can change the GPU from Graphics to Compute....... Is the new Radeon Driver better than the Mining driver suggested to use cause i have noticed the older driver do not have the option to change from Graphics to Compute.
For those not seen this its on Radeon Settings > Gaming > Global > Down the list GPU workload