Hi all ! faced such a problem, my miner works on firmware 09.14 + overclocking the core to 1000 and the auto frequency is set to 1. but there is no stability! with all this, it consumes 1500 watts of power! There are skoks up to 20 gigahash! and on the pool, too, these slopes are fixed! But I noticed that not all panels on the blade became active, but at the same time each blade gives out in peak to 10-15 gigagesh! which pushes to the idea that it is quite likely that the manufacturer has programmatically limited the power to 6.8 gigahesh! and sorry for the mistakes, I'm just from Russia)))
https://ibb.co/2Nyn4Q0https://ibb.co/r5VRtdkhttps://ibb.co/Y09yzHxhttps://ibb.co/7nK6cKXyes it is true. my device z1 and my friend device is z1, too. we bought them almost same date. both we are using 1409 image verison. we used same config but he made oc to 1000 mhz but i can not. think about how come it is possible. this is strange.