Have been playing with OS+ tuning. Anybody know the most efficient setting for temperature and power. I can get close to 75w/th with 1050w setting at 75C target temperature. This is with my best hashboards. I find higher temps I start to lose efficiency, but I do like the lower sound around 80C or 85C target temp.
I find with the power setting of 900w or less, efficiency isn't that great.
I chose 900W in the configuration with default fan and temp settings and it auto tuned my S9i to 825W at 11.9TH. That's 69.3 W/TH
Another S9i I chose 800W with default fan and temp settings and it auto tuned to 723W at 10.4TH. That's 69.5W/TH. It always ends
up with a watt reading lower than what you choose on the configuration page.