i want to share with you guys my experience to increasing the hashrate in claymore,
first of all windows defender and windows update assistant both have to be off, for turning the windows update assistant you have to go to task schedule and turn the windows update assistant off.
2nd step you need to mode bios of your GPU
3rd step install an appropriate blockchain driver for your GPUhttp://how-to-mine.com/softwares/Drivers/AMD-Cards/AMD-Radeon_RX-Series/Radeon_Driver_Blockchain_Edition.zip
then you need to install MSI after burner for over clocking
now you can open claymore and enjoy mining