Part 1: I've been experiencing horrible stuttering in-game, particularly on the Moon. The stuttering worsens the longer I play, from a few times a minute to every 2 or 3 seconds. Firing a gun triggers it. Someone else firing a gun triggers it. Effects trigger it. Walking past a block of glimmer on the ground triggers it. Seemingly anything at all triggers it. Part 2: This is the unusual part. There no reported losses in FPS. CPU, GPU, and RAM usage never spikes. I reduced audio quality to CD, minimized the number of running background processes, confirmed that AV is not scanning the game files stored on my SSD, enabled V-Sync directly via Nvidia and disabled it in-game, and also disabled FPS caps in-game, all to no effect of any kind. Part 3: This is the really oddball part. I've seen the reports about friends lists in steam of 300+ leading to issues. I have exactly three friends in Steam. I blocked all three. All stuttering immediately vanished, except for the Moon, which I see occasionally. More oddballness (totally not a word, I know) about the Moon stuttering is that I see it in patrol zones, and in Nightmare Hunts, but very, very rarely in Strikes. When I do see it in Moon strikes, it hits hard and repeatedly for anywhere from 10 to 20 seconds, then levels off and pretty much goes away. Part 4: Stuff is broke. Please investigate. Edit: I partially fixed this! Of all the goofy things, it was the DVR function of Game Bar, which I'd left enabled from back when I'd still been playing Far Cry 5. I was seeing Video Encoding spikes while monitoring my GPU during gameplay, which led me to Game Bar. The instant I turned off DVR, the horrendous lag spikes ceased. I still experience them on the Moon (rarely anywhere else), but they no longer include audio distortions, nor do they cripple my play. They're just brief frame drops, typically as other players load into the zone I'm in.