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So I also swapped the fans to Arctic F12 PWM. Got it quite silent. However my temps went to 55 PCB and 72 chip. I tried to find out what the max is for B3 but haven't found it anywhere, only other miners. Any info on that? Got temps down to 49/66 with some more ventilation.
Well, in my experience (as an electronics engineer), most processors can comfortably handle much higher temperatures, although sometimes other issues such as solder fatigue can develop over time at extreme temperatures, especially if temperatures fluctuate greatly. However, at temperatures below about 80 degrees C, it's unlikely that there will be any such issues, not unless build quality is very poor.
It appears that the hashing chips used in the Antminer B3 are Sophon BM1680 neural processors:
https://bitcointalk.org/index.php?topic=3870665.0
https://en.wikichip.org/wiki/bitmain/sophon/bm1680
Datasheet:
https://www.sophon.ai/drive/view.html?id=21
The datasheet states:
Quote
Operating temperature: 0~125°C
I wouldn't recommend running the BM1680 anywhere near the upper temperature limit, due to the strain that may put on solder joints and surrounding components but, in my opinion, I would say it's unlikely any damage would result from continuously running it at temperatures below about 80 degrees C.
Many thanks VanAllen!
