I find that this resets with every reboot?
Can I make it stick?
Or is it irrelevant of my power plan is Bitsum Highest Performance?
Thanks.
AFAIK, that option is for temporary use, if you want a more permanent one either adjust power plan depending on what you want (sleep, display, HD) or you could pick a process that keeps from going to sleep (anti-sleep processes option).
It depends on your needs.
You can change the sleep options of each power plan in the Power Options of Windows.
If you do require an over-ride of those settings, set some always running system process (e.g. lsass.exe) to anti-sleep by right-clicking on it, selecting 'Prevent Sleep -> Prevent PC and Display'.