Dears
I use SRB miner old and new version  Heavy - double thread  - GPU MSI rx480 g4 - samsung memory - win10pro - before change win10 hashrate is 720H/card but after install new win10 hash decreased to 550H/card
old and new driver is crimson blockchain
 any help to restore hash to 720 again??
Note: eth hash is 30.5 dual mining and no problem found on it