Describe the problem
When choosing a value of 'Maximum % of CPU time" BOINC will schedule the runtime in seconds.
For example, selecting 25% will make BOINC tasks run for one second, and sleep for 3 seconds.
In a multi core environment this is quite detrimental for performance, power spikes and more.
Also when all the tasks start at once, the computer often is less responsive for one second, and then 3 seconds is very usable.

Describe the solution you'd like
It would be beneficial for the system to spread the multi-core tasks in time, using slots.
For example, if we have an 8 core system with a 25% usage selected, we have have 8 tasks running:

• First second: run 2 tasks out of the 8 (tasks 1, 2)
• Second second: run next 2 tasks out of the 8 (task 3, 4)
• Third second: run other 2 tasks (task 5, 6)
• Fourth second: run other 2 tasks (tasks 7,8)

Second example:
In a 100 core system with a 1% CPU load selected:
In the old situation all 100 cores would run for 1 second, completely bogging down the system.
For the next 99 seconds there would be no BOINC tasks running.
In the new situation, every task would run for 1 second in consecutive order.

This would provide a better user experience:

• Fans will not throttle up and down that aggressively reducing noise
• Power supplies have a less hard time
• More gentle thermal effect on CPU (less expansion/contraction cycles
• Computer is more usable in general
• Simply makes much more sense

Additional context
In case you want your computer to consume a steady amount of power this is the only way.

Note: It would be beneficial that CPU % LOAD is separately configurable to GPU % LOAD. Same concept, but time slots also take into account amount of GPUs installed in the system.