I have the same issue as others have posted on here with full-screen implementation not really being full-screen. I suspect it has to do with Windows 11 24h2 because I know someone who got the issue specifically after they updated to Windows 11. It could be related to 24h2 specifically though if anyone has had the same issue on Windows 10 24h2 as well. It seems to happen on AMD and Nvidia cards so it's probably universal on that end. Personally I lose about 100fps in the menus from 300 to 200, and in-game I lose about 80fps from 200 to 120. The stuttering is very very noticeable for someone who has a high refresh rate monitor like 240hz. The fps loss is not the primary problem but the issue is that the frame pacing is completely messed up and the game is not smooth at all despite being over 100 fps. TEMPORARY FIXES THAT WORKED FOR ME: For me I fixed the stuttering by having another application open on my second monitor, if destiny is the only thing open exclusively then the game is unplayable but for some reason if another application is open on another monitor then the game goes back to normal. Obviously this is not possible for everyone since not everybody has another monitor so we really need a fix from the devs. Playing the game on windowed mode also works as others have said but that sucks as well because the game looks very ugly in windowed mode. On a side note borderless fullscreen is also broken on Windows 11 because the game window does not bind to my screen in it's entirety, it usually just ends up being stuck on half my screen. So borderless fullscreen is basically useless and you can only choose between fullscreen stutter or ugly windowed.