What kind of performance can I reasonably expect on S9 and S9i, assuming I set powerlimit to 1500. For some reason autotuning is giving me 16+th on one..and only 14th on the other, even though both have all chips active? I’ve heard of people getting as high as 18th+?
Some chips are just bad and can't be tuned above their average, of course, assuming you are doing everything right and your PSU is in great shape, so don't expect that all gears will perform the same, that won't happen. as far as the 18th claim goes, it's possible but most likely not without liquid cooling, I am pretty sure most gears will collapse when you start pushing past 16th, overclocking your gears to 16th is already a bit risky, attempting to go higher is a toast recipe.