No overclock will make them run at 10th reliably. Someone is full of crap.
Also with the Avalon being the least efficient 16/14nm miner, overclocking it and taking it even further out of its efficiency range is a terrible idea.
I agree.
We get a nice range between 7.9 and 8.1 from our (
741's at '0', and about 8.1 to 8.4 at '+1'.
Temps run 28-31 and 86-91 at '+1'. This is with 50 degree ambient air coming in.
Amperage draw per bank of (4) units is around 24amps (208v) at '0' and 27-28amps (208v) at '+1' so they do loose a margin of efficiency when they are overclocked. Almost certainly overclocking shortens the MTBF life of the units, but I could not say how much. Not really worth doing IMO.