I've had this issue since August 13th, I've done a ton of things. Like reinstalled windows 3 different times. Changed out numerous parts. Had someone tell me to check out Latencymon, so that's what I did. I saw the ISR count was high for an audio driver. It ended up not being a nvidia driver, but the Realtek Audio one. So I disabled it in my device manager. Here's an imgur link of a ten minute test. I see all these things with high ISR and DCP, but I don't know what they are. And obviously resetting windows didn't do anything.
View: https://imgur.com/a/WoOMUjD