My rig is stable for weeks on 100% po, will try to lower and see the diff.
You should see much lower temps and obviously lower electricity usage means more money!
And with all that your hash rate should not change by much if at all. But definitely experiment in the 60-80 range.
Yeah 80% PL is the best bet for lower energy usage and heat output. Also keeps the hardware running cooler which is great if you have your setup inside. I notice a significant reduction in heat output at 80% PL compared to 100% PL. Have to also imagine it uses much less power and is healthier for the gpu's.
I'd personally suggest to anyone to at least compare their rigs at 100% and 80%. You won't lose that much profit but the quality of life is vastly improved. I also set my fan speed to a consent level, depending on the gpu. This avoid the fans ramping up and down which just doesn't sound healthy for the fans and drives me crazy to hear.