How To fix Mouse lag and FPS!

[Stay Limber Bro]

Credit goes to Gamepur.com

How to Fix Mouse Lag in Fallout 4:

Go to C:\Users\yourusername\Documents\My Games\Fallout4. Open Fallout4Prefs.ini and then change the following parameters:

iPresentInterval=1
to
iPresentInterval=0

Also change:

bForceIgnoreSmoothness=0
to
bForceIgnoreSmoothness=1

To be sure, you should also change the iPresentInterval in Fallout4.ini.

Fallout 4 Mouse Lag fix for Nvidia Graphics Card users:

Go to your Desktop, right click the Nvidia Logo at the lower Right of your Desktop. Choose "System Settings" or whatever it is in your Language. Now go to "3D Settings" and Add Fallout.exe to your Programs.

There change "Triple Buffer" to ON.
"Max frames render ahead" to 1.
And finally "V-Sync" on.

With the above Settings Fallout 4 runs at Max Settings and FXAA with 80 - 120FPS (120HZ Display) and no Mouselag / Tearing etc (already tested by me). I am running Fallout 4 with a NVIDIA 980 GTX.

Note from me, it has helped me with both the mouse and the Fps from 30 to 60 :)

[Denial94]

thank you so much. I have 45 fps with gtx 970 on ultra 2560x1440. And because of that I was feeling like I have 15 fps because of mouse lag. Now mouse lag is gone and I still have vsync by doing your 2 methods together.

[SuperSamson]

Worked perfectly!

[MrAchsas]

omg thanks it feels like a totally different game now <3

[𝔗𝔥𝔦𝔫𝔤𝔲𝔰 𝔄𝔠𝔱𝔲𝔞𝔩𝔦𝔰]

it really works,no more mouse lag
still very unsmooth camera movement because game has no motion blur and vsync adds lag but at least it isn't as slow as it was before

[𝔗𝔥𝔦𝔫𝔤𝔲𝔰 𝔄𝔠𝔱𝔲𝔞𝔩𝔦𝔰]

And seems to fix fps drops as well,at least it's lesser than used to be
Or significantly less noticeable

[Kubistonek]

You know it's a ♥♥♥♥♥♥ guide when the author thinks that "bForceIgnoreSmoothness" has something to do with the mouse

[𝔗𝔥𝔦𝔫𝔤𝔲𝔰 𝔄𝔠𝔱𝔲𝔞𝔩𝔦𝔰]

Początkowo opublikowane przez Kubistonek:

You know it's a ♥♥♥♥♥♥ guide when the author thinks that "bForceIgnoreSmoothness" has something to do with the mouse

yes it turned out to change lighting quality but not anything connected with mouse...just give a few fps by lowering the lighting
proper mouse fix is a mod from nexus

[bLaCkShAd0w]

Początkowo opublikowane przez Kubistonek:

You know it's a ♥♥♥♥♥♥ guide when the author thinks that "bForceIgnoreSmoothness" has something to do with the mouse

Ignore mouse smoothness aka bForceIgnoreSmoothness means an algorithym to "predict" the position of a garbage dpi mouse so it isn' so abrupt and jarring. So yes it does have something to do with the mouse...

[Shadow]

Początkowo opublikowane przez bLaCkShAd0w:

Początkowo opublikowane przez Kubistonek:

You know it's a ♥♥♥♥♥♥ guide when the author thinks that "bForceIgnoreSmoothness" has something to do with the mouse

Ignore mouse smoothness aka bForceIgnoreSmoothness means an algorithym to "predict" the position of a garbage dpi mouse so it isn' so abrupt and jarring. So yes it does have something to do with the mouse...

https://www.youtube.com/watch?v=Ebt12xTDY1Q&list=PLFqTvOsjFbRrhDaYnubBSk6OBVQ9x5FqK&index=2

[r3ach5stars1]

IS WORK ♥♥♥♥♥♥♥♥ thank you

[Pawmaline]

If it doesn't work, change the files to read-only, that fixed it for me.

[[Klan]itsme]

Even in 2024, this is required to play this game! Thanks

[Klagshamn]

The Nvidia part worked like a charm! Thanx!

[HintofSarcasm]

Worked for me on the ms store version and didnt do both files or nvidia card settings. Thanks

[Monke]

9 years later and this still is a godsend. Fixes controller aiming as well.