https://www.dropbox.com/s/9l06keakjz9hqno/WhatsApp%20Video%202019-07-03%20at%2007.40.06.mp4?dl=0@PAtrike watch the full video the surprise is right at the end, it lasts little.
If you see that rig you have one or two hot cards. They are already revised, I have done maintenance and I have even changed the heat sink kit for an Artic cooler IV, which is much better, but they are cards that are forced.
If you look at the second card, the 01. You will see how it changes too many times of core frequency, the fast changes feel very bad to the 1080ti, and at the end of the video you can see how in 3 seconds it goes to 1900 mhz and it suddenly drops to 900mhz.
That's like headless chicken, it goes a little crazy. Take the temperature in real time and act, and should have a bit of hysteresis.
For example, I set maximum temperature 76, when it reaches 74, it drops 100 MHZ, if it reaches 75 it drops another 100 MHZ, (always leaving a minimum time of 10 seconds between changes that gives time to the relog of the 180ti assimilate the changes), if it reaches 76, another 100 MHZ. And go looking for a frequency little by little so that the rest of the mining remains fixed, if at 1100 mhz it is stable between 75 and 76, there is no need to make changes unless it reaches 77 and you drop 100Mhz (100mhz it's an example).
Its objective that once reached the temperature more or less limit, stays more or less stable in a fixed frequency, and not changing to the crazy thing. Look at the other cards that do not heat up as they stay within a small range.
What can not be that when you lower two degrees, release again and go to the maximum in this case 1900 mhz and suddenly fall again in 3 seconds to 900. As a result the Rig falls often, some cards after a restart miner, they stay at 0. THE source of food suffers with such drastic changes
You should look for the best way to try that when you reach the temperature limit go down the MHZ of the core, giving ample time (about 10 seconds) between changes of MHZ, and never a change to more or less, be as huge as 900 mhz. And look (you will have to improve the programming) a core that in that situation remains more or less stable. It may take 5 or 10 minutes to get it, but it can be done.
Small changes in advance and with time to spare between them, to find a core to leave it more or less fixed. What I see are abysmal leaps. That card usually works at 1400mhz and the rest at 1200, that's one reason why it heats up, another reason is the model itself. But two rigs that I have with 1080ti have the same bad behavior, and I'm sure that if many people use this function, it will have problems like me constant restarts when I reach the temperature limit. There to give more stability. The idea is good but you have to develop it better. I'm sorry to be critical, but it's to improve your product.
It seems that people only know how to complain but they do not look for the problems and they do not report them through the forum, nor do they want the people of my telegram channel
I have people who complain to me every day and I always tell them to post here with images and data to give you information, but it seems that I am the only one in the group that does it.
I hope that the video encourages you to see that Core is a bit of control and that destabilizes the rig, being many and fast, and some of a lot of difference, you have to look for a more or less optimal value and leave it almost fixed, you can not oscillate so much. IN the 1070 is not a problem, but the 1080ti are super delicate with this, that's why we have delay options when we apply OC to start the miner.