Firefly wrote: ↑07 Jun 2022, 03:40
1) What does VRR and DWM stand for?
VRR is Variable Refresh Rate. NVidia's VRR product name is g-sync, AMD's is freesync.
DWM is the Desktop Window Manager of Windows. It composes the image you see on the screen by copying the contents of windows and then mixing them all together and applying various effects on top of it (like shadows, blur effects, etc) and then presents the end result. When it is active and doing all those things (compositing, effects, whatever), g-sync cannot work. The reason is very technical, but let's just say that DWM simply gets in the way between the game and the nvidia driver. When the nvidia driver doesn't have direct access to the game's graphics because DWM sits between it and the game, g-sync stops working. Windowed g-sync mode is a hack that modifies the way DWM works in order to get g-sync to work, but it's not reliable. Fullscreen mode, where DWM is disabled, and the GPU driver has direct access to the game, is much better.
2) Does the setting affect alt-tabbing in & out of fullscreen games? I don't play games in windowed mode anyways, but I do alt-tab.
As far as I can tell, the setting only affects windowed mode games. (Including "bordeless" mode, which is just windowed mode where the window is maximized, and the window borders hidden.)