until memory clock will go idle (in a few seconds), then enable GPU again in the miner, new clock will be applied after that.
It will be the same as restart miner? I remember that at startup miner try ti find best dcri value, so trick with enabling/disabling GPU with new memclock may be not best way, because optimal DCRI for this card with new memclock may change?
Or optimal DCRI may change only if CORE clock have changed?
It depends... Anyway you can use "+" and "-" keys to change dcri to see if they are good for new clock. Or just set fixed -dcri, find highest stable clock and then find best -dcri value for this clock.