@kurutoga
so for now i have no further problems with the cooling ... only somehow the one compac f miner always goes back down to its 200mhz. what could it be?
3: GSF 10051622: BM1397:01+ 200.00MHz T:170 P:43 (64:32) | 21.2% WU:^44% | 28.20G / 46.01Gh/s WU: 642.8/m
the other two miners remain steady at 500mhz
and i have one more question... is it possible to change the performance of the miner during mining (without interrupting it)?
edit: now this miner has now even gone down to 170mhz...
[2022-08-01 18:13:48.508] 3: GSF 3 - 31.93GH/s low [134.40/107.52/140] reset limit 200.00MHz -> 190.00MHz
[2022-08-01 18:13:48.564] 3: GSF 3 - new frequency 200.00MHz -> 170.00MHz
Very nice setup btw! If you have one stepping down it is because it is having trouble keeping up with that frequency and its a flag setup in the drivers so it can try to keep the stick mining by stepping down the Frequencies, this is fairly simple to fix thankfully if you have a USB voltage reader. The sticks from the factory are tested at only 400MHz anything after if it doesn't work right off the bat you have to adjust the voltage regulator on the stick. I personally do it with every stick so that I can keep each USB port under 3A at the frequency I am running it. There is a few post on here with how to adjust and remember follow like it says, a small change on the POT can be a pretty big swing on power to the stick.
You can make the adjustment and start CGminer again and you are trying to keep % and WU: % pretty much as close to 100% on both, but when T: 500 and P: 500 you want both to be at 100% WU: 100%. During the start of the sticks it ramps up the power which is why those numbers will fluctuate and there is some information by Kano and Sidehack in here about it. It'll drop here and there as P rises toward T (target) which in your case is 500MHz. But if it does downclock itself the only way I know to reset the process is just to restart CGminer.
I have used the Noctua's like Cygan has and some of mine still have them on with the 3d printed adapter. Mine were just powered via 3pin fan connectors as they come from the factory. They worked very well at 500Mhz-525MHz and I had 6 of them running across 2 Gekko Hubs. As I got more sticks I decided to just use 120MM fans up top to cool them down because I saw the same performance and it was much cheaper than buying 6 more Noctua's when I have a TON of 120mm fans laying around from other builds.