Nice...
by the the new BM1384 chip has a max operating temp of 125c...(weather it's ambient or chip temp not sure) but either way, it can run 60-70c just fine..that's why the software has a stop mining is reached 80c checkbox.

see for your self:
https://www.bitmaintech.com/files/download/BM1384_Datasheet_v2.0.pdfchapter: 4Electrical Character
section: 4.2.
have a nice day

and the vrm's and other components are the same way new = better
DO YOUR RESEARCH PEOPLE!!!
I said this in the other thread, 125C is a TJ, the sensor you're reading is likely on the PCB and so when its reading 70C, its probably 120C on the actual chip. Do your own research before asking others to do their research when your advise may be catastrophic for their products.