The 1080 Ti is very effiecient as far as power per Hashing power in Skein. For example at 55% TDP my aorus is most effienceint at 55% but only like very very slightly. All the way upto 75% it was similar effieciency. It started to drop off at around 80% and dropped off even more at 100% stock.
At 55% I was getting 821 MH/s, At 80% I am getting 947 MH/s and at 100% I am getting 1009.
The thing is even with the Efficiency better at a lower rate it was ALWAYS better to run it at the highest Hash rate because the return is higher because of the price of power and the return you are getting. So you need to do some testing and put your numbers into a calcuater. I run a 90% to keep the heat down.
Appreciate the feedback.
What is wall reading on %55TDP of 821Mh/s and on %80 for 947 Mh/s?
Does it directly/approximately correlate as with default TDP (%100 and 250W) to reduced TDP by X percent so wall is 250*X Watts.
Another thing that got my attention is that, maybe a coincidence, Auros 1080Ti is preferred by many for 1080Ti mining as far I seen in the threads and post.
I may give it a shot as well.
Actually its a multitude of things that go into, especially when you have multi gpu setups.. for example
My 2 x 1080ti rig is running on the stock oem fans.. with settings at 70% tdp, when you look at the multiple cards each one will be running at different rates more than likely.. for example...
GPU0 TDP70%, actual usage TDP63%, fanspeed 68%(Auto) to maintain 69c temp limit. card mines at 69c
GPU1 TDP70%, actual usage TDP70%, fanspeed 51%(Auto) to maintain 69c temp limit. card mines at 58c
If you realise the program is not forcing the GPU to 70%, what it is doing is checking all of the settings you changed, it goes down the list if ANY of the numbers = (Equal) or are greater than the numbers you set, it performs internal throttling. So in the example above my GPU0, because temp limit is hit, it pulls voltage automatic tell temp limit is reached along with raising fan speeds.. it will go back and forth and finely increase the both tell the limit is hit again and then maintains at that point it seems..
So if i go under GPU0 and manual change ONLY that card to 79c limit. because the gpu is capable to maintain temperature of 77/78c at TDP70%, it will gradually raise the actual wattage used and stop when TDP is reached.. in my case the card temp sits at 77/78c, which i really dont care for.. so i force it to stay below 69c by changing the limit to 69c... which brings the usage back down to 63% TDP... the reason the first card is suffering is because i currently have them sitting next to each other in a mid atx case, which is causing the exhaust air of GPU1 to mostly be intaked on GPU0, so GPU0 suffers because its being cooled by hotter air...
One thing to note is once you set fan speed to manual you remove stage 1 throttling, which is what i explained to you above. The cards i have, have a built in throttle which is the manufactures max card temp, which throttles the core, mem, and voltage back based on a sliding scale... so if stage 2 throttling starts, it automatically overrides anything stage 1 throttle is performing to attempt to prevent damage to the card.
