Hello,
I'm not a specialist of that but,
I testing actually 3 box, 2 with S912 the Beelink GT1 and bqeel K12 and 1 with S905 the Beelink M18. I using the recent kernel 5 on it.
The CPU Temp is correct (30-35°) for the S905 with the M18 box but with both S912 (55-60°) with fresh install.
The M18 is to old that my S912 box's but have not CPU Temp issue.
No solution to use the S912 proc like underclocking or change some service or parameter ?