Task Manager is a good suggestion. Related, try the free utility DPC Latency Checker. It says it isn’t updated for Windows 10 but it works. Instructions are clear on the website.

Yes, rereading this original post, it’s about Reaper. When I first saw the problem elsewhere, I didn’t know that. Unless there are plugins involved, 6 GB RAM shouldn’t be the cause of this problem.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.