The reason is clear. Lack of power supply. For frequencies above 750, it is necessary to increase the power supply to at least 0.9V with appropriate cooling of the chips and PWM drivers. At a frequency of 750, the chips work and do not fall off, but due to internal errors, the hashrate drops
i have batch 1 running on 750Mhz, are u suggesting that goign above has no sense as the hash will drop due to not enough power?
My batch 1's run at 762 anything higher it loses hashrate but does not error so I know they can handle higher. I ran it as high as 800 but 1 board dropped within a few minutes. You also have to follow the clocking pattern it seems to go in intervals of 6 with the exception of a few where it jumps 7