Apparently the LHR mechanism is individual and depends on the consumption of the video card, on my video card on the same drivers I can achieve somewhere 85-86 megahashes, while increasing the memory frequency over 850 MHz is not effective, the speed does not increase, and the LHR limit is reduced, as well as any locks with the parameters lock-cclock, lock-cv only reduce the speed, the optimal value is 0
I think this is due to the fact that with an increase in the clock frequency of the memory, the total consumption of the card increases and ultimately it exceeds a certain limit set for the LHR to operate