The 80%CPU used for one "processor"seems to be specific to Win10.
If I use Win7_32 (most of my PCs are Win7) the result is not the same. Using an I5, Minitioune occupied 14% CPU, whole CPU used is 22%
and the distribution of %CPU for each processors is more equal:
So, it is not Minitioune software that decides to use 80%CPU in your case, but Win10, (or the way that Win10 show CPU% used is not real ?? or strange? perhaps this pseudo 8 "processors" are half real processors and that should say that 80%pseudo CPU = 40% real CPU ?...)
By my side I consider that Minitioune using only 14%CPU is not a shame, when I look at the way the different processors are working under Win7, I don't see any warning that tell me that one processor is 80% or full used.
the way these core i7 CPUs work means they throttle up and down so it is throttles to the max 4 GHz and they immediately the CPU fan speeds up and power consumption increases on my laptop
I don't know what to do when Win7 and Win10 seem not to work same way and show so different result, my software is the same.
When a software use only 12 or 15% of CPU, I think we cannot say that it is a great power supply consumer.