Phil fwiw. My method was to set pl pretty high, like 135-140. Then mess with both clocks while recording hash per watt. A combo of clocks rose to the top above which no extra hash was produced but more power was burned up to the pl. Setting back to the best settings ended up drawing around 118 watts max in software, so I just set pl to 120, basically a couple ticks above where it consumes anyway. It waivers mostly 113-115 watts sometimes touches 118 max.