Yeah, thats why I am asking. In the meanwhile I also have units, that show normal temps when using fixed freq. fw. So its a bit strange. Thats why I thought of maybe wrong readings.
What do I check in the kernel log?
I think the readings from other firmware is PCB temp while the other firmware is for chip temps which should be different.
You can check the logs by searching local temp and middle temp result.
For other references, you can check this post.
https://enforum.bitmain.com/bbs/topics/3696