Hi jce,

Why my core i7-8700k,when mine cryptonight sometimes starts with good hashrate ~=400 h/S but sometimes start with 270h/S and i have to do several restarts of miner ( or open multiple instances) to make it to maximum and sometimes i quit and i leave it in the low hashrate..

Very anoying, with other miners is the same, example the claysmore..   

Regards