Lowering polaris power consumtion

I will be writing real consumption approximated to one card from rig total consumption, it would be great, although impossible if people with consumption measured byt hiveOS or hwinfo or what not would not react at all. I know that system apart from GPUs us using 20w so I will just ignore that as it is insignificant.

Now my real consumption I will be writing about is not taken one minute after miner starts, but it is 24 hours consumption of rig running for moths uninterrupted, fans under 20% (i know fans make more then 100W, more like 200w of the consumption).

So here we go
39.75kWh/day per rig that means 138w per card. Now it is still relatively cold outside, so not much going to fans, again under 20% load.

I get about 350Mh/s real hashrate with this settup on ethereum, and 12.5 kH/s on XMR. Consumption is about same both ETH and XMR. Again these are real hashrates over long period of time, not miner SW reported hashrates, etc.

I'm running cards on the classic 1150 at 880mV. I can't go to the 850mV that people write here about as rig is then unstable. Again stable for me means running for months without miner SW restarts.

So is here someone who managed to lower power consumption on polaris and is willing to share real info and not something that works for one card and even then crashes after few hours or is using hwinfo power consumption?

I will add that rig i'm measuring on does have 3psus that are 80plus gold, so I guess maybe up to 200w is wasted on the psu efficiency if I only used 2 psus, but this is reality from the dual mining days and I guess lot of rigs are stuck with 1 more psu then needed.