I’m a bit reluctant on advising with Over Clocking because it is Brand and Board specific. Each manufacturer does things differently. To reiterate I am using EVGA 1080 Ti FTW3 cards, no BIOS mods and in the default BIOS switch position. Your milage may vary and you do this at your own risk, I take no responsibility for the advise nor damages or losses you may incur.
I have been further playing with increased power consumption per card and it does a few things, 1) increases rig overall power consumption, 2) increase board temps, 3) increase cooling requirements and 4) increases hash rates. I’ve been mining mostly BTG these days as ETH and ETC have been too price volatile (on the decline) whereas BTG has increased and the price is more stable overall. BTG mining with EWBF seems to gain no benefit with the Pill whereas ETH and ETC most definitely gain from it’s usage.
BTG Specific: The image where the power limit is set to 150 yields ~920 Sols/s with 13 cards and the image with the power limit at 168 yields ~960 Sols/s. Again, greater power consumption, card temps and greater hash rate. Since some whales have been pounding BTG and to stay in the race for mined coins, I have opted for the higher power consumption. My equipment is in an environmentally controlled room with adequate cooling and additional air circulation plus the enclosed rig cases use Delta 4200 RPM fans (really loud).
Image with power limit set to 150
Image with power limit set to 168
Rig with 13 cards and 168 power level: