I'd like to see -minspeed option implemented with claymore's zcash miner as well, it has been most helpful with his ethereum miner. I've noticed quite a few radeon drivers have tendency to randomize new core clocks pretty much every time display goes to sleep/wakes up, clocks can go either to idle or something in between idle and base. As that lowers the hashrate, minspeed detects it and restarts miner with proper clocks.

Same has happened with 390 and 570, countless of different radeon driver versions... Basically it's just easier to battle it out than try to find working drivers, so I've just used ethman to restart zcash miner but -minspeed would just make things super simple.

Edit: To specify think this only affects windows 10 and it's various versions, haven't noticed same thing would happen with 7.