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Also this:
Almost everyone that has used a computer or played a game within windows within the past 24 years has always known that vsync will always incur some sort of input lag or delay in input. It can not possibly be removed. It's inherent to the very design of Vsync and how it functions. No one should ever be using VSYNC for any reason in any game or program or app. Recommending someone to turn on vsync is single-handedly the worst suggestion anyone could ever possibly make for anything.
Vsync input lag comes from pre-rendered frames being used. You can literally use ULLM to debunk this myth immediately.
There is inherent input lag, but none that makes any meaningful difference and 99% of users wouldn't ever be able to tell. As long as a CPU can hold a locked framerate under the refreshrate, it will not use pre-rendered frames. If you are experiencing input lag from Vsync it's because you can't hold a locked framerate or aren't using one to prevent pre-rendered frames from being used. Vsync input lag becomes apparent/troublesome when pre-rendered frames cause overshoot past the refreshrate.
And now that we know that everything you say, suggest, or recommend to anyone in the steam forums can not be taken seriously. You openly admitted to telling everyone to degrade or worsen their gaming experience on purpose.
You have to use Vsync to avoid screen tearing 100%, VRR doesn't completely remove screen tearing as I said before. If you get massive input lag from having it enabled, that's likely because your monitor has trash latency already, you aren't capping to a framerate your CPU can handle 99.9% of the time under your maximum refreshrate which causes pre-rendered frames to be used, and you aren't limiting pre-rendered frames in DX9-11 games using LLM or ULLM.
I only notice the input lag with Vsync on because I'm a top 500 FPS player and can notice those things, and the difference between it on vs off is about a 1% difference in input latency on my system/monitor when my CPU is holding a locked framerate. To the average user, this would literally be unnoticeable and I still have it turned ON while I'm playing competitive top 500. Any type of tearing in the image is going to affect me worse than the 1% of extra input latency. If you have your monitor at 144hz, and you can run a game at 144hz locked, those pre-rendered frames are going to introduce the input lag you claim to be a problem because it will force your framerate over 144fps (145/146fps), which is like a 20-30% difference in input latency. The fact that you don't know how to cap your framerate properly to avoid Vsync input lag is hilarious.
I could force my monitor to 60hz fixed without VRR, cap to 59.993 with Vsync on and still walk circles around you in every FPS game. It makes no difference and this has long been debunked by BlurBusters. You can literally check this on your own system.
Also, yes, my stuff runs in exclusive fullscreen because Full Screen Optimization is a completely optional setting that you have control over for DX9-11 games. Lmfao.
Try running Geforce experience and pressing the optimise button.
If you still cannot get your game to run at expected frame rates then the problem has to be on your end. One does not have to use mods and can completely disable VSync in the game just for a test. If it then still syncs then it is a tool, an extra layer, or the driver doing it.
https://steamcommunity.com/sharedfiles/filedetails/?id=3241230342
After patch barely 30fps in downtown.
Changed my card to a 4070, deleted the game and all game files from mods, I did the cleanest clean install ever. Same area same 30fps with a card twice as powerful as the previous one. This patch is a joke.
Did you disable fullscreen and windowed optimisations in the Windows settings by any chance? I know some folks turned those optimisations off, thinking it lets them get around their vsync problems, and it does, but it also wrecks frame rates.
As to why you are getting low frames on a 4080, the post above might be worth a shot. The other is working around the games vsync (ipresentinterval) issues. Sadly that means using mods, or a display with refresh rate that divide nicely with 60fps (60/120/240Hz) and so on.
Would be great to be able to select a different display mode in-game, but that's just one issue among many others. I would prefer using 120Hz 10-bit mode myself with VRR/Gsync, but that seems like it's too much to ask.
The Next Gen Patch broke everything. I was getting 60 FPS before the patch, but lockpicking was too fast. After the patch, 60 FPS standing still with nothing moving around me (although lockpicking worked because the game was forced by Bethesda to run so slow). Same exact settings before and after. All drivers updated. Trying to force 60 FPS through video drivers resulted in CTDs within 3 minutes of starting to play, every time.
Bethesda broke it, they can fix it. If and when they ever get around to it.
Hence I am saying to check again, because now they undid this with their second update!
Do check in all three .ini files under Documents\My Games\Fallout4\ for iPresentInterval and set it to 0. And if you have touched the .ini files in the game's folder then set it there to 0, too.
Then check in Windows Settings System->Display->Graphics->Fallout 4 if you have windowed optimisation turned off or on, and uncheck it, meaning, turn optimisations back on.
Then check Fallout4.exe in the Steam folder. Right-click and bring up Properties->Compatibility and if you have optimisations turned off there, too, then uncheck it and leave it turned on.
Then check your driver settings, but you will probably already have done this. And if you use any tools, like Rivatuner of MSI Afterburner or whatever, then also check that these do not turn vsync on.