Windows 10 and Nvidia Drivers are fully up to date -- inline with the Blur Buster's guide my typical approach is to enable V-Sync Globally in the Nvidia Control Panel (to enable the "frametime compensation" module or what not) then I disable V-Sync in-game. G-Sync is ON for both Windows and Fullscreen mode in the control panel settings. For most games, this is enough in conjunction with an FPS limit of ~3 beneath monitor refresh and G-Sync works just fine and dandy. Also, the Nvidia control panel default now globally is to force the highest refresh available so that's set too. However, this particular game (Dark Souls 3) misbehaves like I have just never seen -- I've tested this quite a bit today and what appears to be happening is that the game is forcing my monitor to behave as though it is a standard/traditional (non-G-Sync) 60 Hz monitor (it's a 144 Hz 1440p G-Sync panel). At first I though that maybe the game was just capping FPS internally to 60, but it ALSO is forcing the monitor to behave in this way and G-Sync simply is not working at all as far as I can tell. I get V-Sync level input delay and the same V-Sync hitching behavior that occurs when double buffer V-Sync dips beneath monitor refresh. Interestingly if I enable Ultra low latency mode for the Dark Souls 3 profile then it caps the game to 58 internally ("as though" G-Sync were enabled, but it's not) -- BUT, this comes with the same consistent hitching behavior like clockwork that capping 1-2 fps beneath refresh on a traditional V-Sync monitor would have with V-Sync ON. In Windowed mode, the game appears to be using the form of triple buffering that windows uses which is similar (the same to my knowledge basically) to fast sync -- the game microstutters periodically this way but input delay is noticeably reduced (since it's basically fast sync VS double buffer V-Sync if my understanding is correct). This is inspite of my nvidia drivers having the desktop refresh set to 144 hz and inspite of my control panel setting to use G-Sync when in windowed or fullscreen mode. I have simply never encountered this in a game before now -- Dark Souls Remastered for example appears to work totally fine in my tests -- that game you can set your monitor refresh in the options menu + disable in-game V-Sync where G-Sync works fine, it's just the game caps it's fps internally to 60. Dark Souls 3 on the other hand is just ... well, seemingly a garbage fire (tons of what I'm assuming is I/O stutter going in and out of areas on my 3900X / 2080S PC installed on an NVMe drive). But yeah, I tried googling round and couldn't really find much -- has anybody ever encountered this? Or, something like it with other games? I can force V-Sync OFF for the Dark Souls 3 profile but then the game tears constantly. Really bizarre. Anyway, thanks for your time, I appreciate it.