Excellent post and great advice.
I have an odd situation or two with my #2 PC:
Assuming you can help or want to, here goes:
Specs: W. 11 Pro, Ryzen 7 3700x, Gig X470 mb (their best, at that ttime) 32 gb (2x16) of G.Skill B-die 3200 speed mem, 2 NVMe drives, a couple attached HDD's and SSD's..... GTX 1070 GPU.
Issues---
1. even though the pwr settings are (supposedly) corrrect, it doesn't go to sleep when it is set to, (prolly 15 minutes) so I have to manually pit it to sleep or to hibernate.
2. The used memory doesn't self clean as it should. Inside of a few hours of even simple use like web surfing, as little as 3 gb of the 32 gb of mem remains unused. I have the page file amount set plenty high, so that's not it. This is odd, have never had it before. Can't find the culprit, using the several methods I know. Sort of rebooting, I used system mechanic to recover the used memory.. and it can get the amount used down to about 3 gb. After that, even if a couple programs besides chrome are running, the PC hums smoothly.. for a few hours....