Windows 10 Why doesn't my cpu work at 100% for a lengthy big job?

[anotherwindowsuser]

I don't understand why it hovers 75% average. This is doing video processing. Can I make it 100%? Thanks in advance.

 

[HenkB]

Not all subtasks of a job can be performed in parallel, some parts have to wait for the results of other parts. Look at your programs, you write them sequential, w.o.w filling just one processor, other processors may perform system housekeeping functions but these will probably not a produce 100% load. Modern compilers try to optimize programs, not all can be done.

 

[Neemobeer]

Could be power settings, temp throttling etc.