Fallout 4

Fallout 4

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blakesu May 10, 2020 @ 1:01am
FPS Cap Stuck At 48
I upgraded my PC and got a new monitor and decided to try to get back into Fallout 4 now that my computer can actually handle it and it's smacking me with a problem I've never had before.

For some reason the game is capped at 48FPS, it's at least stable but it's not ideal. I used to play the game with an average FPS of 70, with it's cap previously being at 72, before I upgraded my PC.

I've tried lowering the graphics settings and it didn't help, FPS was still capped at 48.
I've tried forcing the game to have a capped FPS of 60 through the Radeon software and that didn't help, it was still capped at 48 when I launched the game.
I have read that you can fix it by changing a line in the .ini file, but I don't know how to do that.

My GPU is the Radeon RX 5700 XT Sapphire Pulse
My CPU is the Ryzen 5 2600
My monitor is an MSI 1440p 144hz curved monitor.

Any help would be really appreciated.
Originally posted by Spec_Ops_Ape:
Disable v-sync - Documents > my games > Fallout 4 > Fallout4prefs.ini file. Change iPresentInterval=1 to 0, save and close. Then cap fps to 60-72.
If the file keeps reverting settings (mine does) right-click / properties / tick the read only checkbox, then ok.
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Spec_Ops_Ape May 10, 2020 @ 1:25am 
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Disable v-sync - Documents > my games > Fallout 4 > Fallout4prefs.ini file. Change iPresentInterval=1 to 0, save and close. Then cap fps to 60-72.
If the file keeps reverting settings (mine does) right-click / properties / tick the read only checkbox, then ok.
Last edited by Spec_Ops_Ape; May 10, 2020 @ 1:26am
Bandy (Banned) May 10, 2020 @ 2:01am 
There was a thread just last week on very same issue, too bad your <search> didn't turn it up...

Check in there, discussion included on whether to cap Bethesda games at 60 fps. There are game engine physics limitations.
blakesu May 10, 2020 @ 2:06am 
Originally posted by Bandy:
There was a thread just last week on very same issue, too bad your <search> didn't turn it up...

Check in there, discussion included on whether to cap Bethesda games at 60 fps. There are game engine physics limitations.

I didn't check the Steam forums, it's like trying to find a grain of rice in sand on here, I just did a google search and read the first 2 pages of results, most of them said the same things I tried, the others said the .ini file fix but not how to do it
blakesu May 10, 2020 @ 2:08am 
Originally posted by Spec_Ops_Ape:
Disable v-sync - Documents > my games > Fallout 4 > Fallout4prefs.ini file. Change iPresentInterval=1 to 0, save and close. Then cap fps to 60-72.
If the file keeps reverting settings (mine does) right-click / properties / tick the read only checkbox, then ok.

thanks I'll try this right now
Bandy (Banned) May 10, 2020 @ 2:10am 
the fps uncap mod is here, looks promising but I have not tried it or read the discussion to see what problems may lurk:
https://www.nexusmods.com/fallout4/mods/44798

Goodluck in the wasteland!
Last edited by Bandy; May 10, 2020 @ 2:11am
wboson May 10, 2020 @ 3:36am 
Originally posted by Spec_Ops_Ape:
Disable v-sync - Documents > my games > Fallout 4 > Fallout4prefs.ini file. Change iPresentInterval=1 to 0, save and close. Then cap fps to 60-72.
If the file keeps reverting settings (mine does) right-click / properties / tick the read only checkbox, then ok.


This helped me also, some1 posted it in Youtube. There are actually 4 places to change it. And after you change settings in-game for graphics it reverts back.
I´m running the game at 120ish FPS atm and only mag locks on security doors give me headahce, have to reload level in order to get them opened. Or is it the problem of FPS cap?

Edit: I have 5700XT also and maxed all settings out.
Last edited by wboson; May 10, 2020 @ 3:36am
:D Jun 8, 2021 @ 9:28am 
Originally posted by wboson:
Originally posted by Spec_Ops_Ape:
Disable v-sync - Documents > my games > Fallout 4 > Fallout4prefs.ini file. Change iPresentInterval=1 to 0, save and close. Then cap fps to 60-72.
If the file keeps reverting settings (mine does) right-click / properties / tick the read only checkbox, then ok.


This helped me also, some1 posted it in Youtube. There are actually 4 places to change it. And after you change settings in-game for graphics it reverts back.
I´m running the game at 120ish FPS atm and only mag locks on security doors give me headahce, have to reload level in order to get them opened. Or is it the problem of FPS cap?

Edit: I have 5700XT also and maxed all settings out.
Hey, I managed to change the ipresentintervals to 0 and reach an fps of 120 but the game keeps crashing! Any tips?
Bandy (Banned) Jun 8, 2021 @ 9:57am 
Originally posted by y.h.:
Hey, I managed to change the ipresentintervals to 0 and reach an fps of 120 but the game keeps crashing! Any tips?
The game engine will only be completely stable at 60 fps for most systems unless somehow lucky for a short interval of gameplay, but then may risk game save integrity? Who knows, not worth risking a long haul game save file.

Regardless of what some say or mods you install, lock it at 60 and just enjoy that.
Last edited by Bandy; Jun 8, 2021 @ 10:02am
I'mDirtyDan Jun 10, 2021 @ 5:47pm 
Originally posted by Bandy:
Originally posted by y.h.:
Hey, I managed to change the ipresentintervals to 0 and reach an fps of 120 but the game keeps crashing! Any tips?
The game engine will only be completely stable at 60 fps for most systems unless somehow lucky for a short interval of gameplay, but then may risk game save integrity? Who knows, not worth risking a long haul game save file.

Regardless of what some say or mods you install, lock it at 60 and just enjoy that.
how do i cap at 60 fps ?
Last edited by I'mDirtyDan; Jun 10, 2021 @ 5:55pm
Dex Jun 10, 2021 @ 5:53pm 
Originally posted by I'mDirtyDan:
Originally posted by Bandy:
The game engine will only be completely stable at 60 fps for most systems unless somehow lucky for a short interval of gameplay, but then may risk game save integrity? Who knows, not worth risking a long haul game save file.

Regardless of what some say or mods you install, lock it at 60 and just enjoy that.
HOW DO I CAP AT 60 fps ? also sorry for caaps

sorry for caps, and yet you didn't bother editing them out when you edited your comment lol
I'mDirtyDan Jun 10, 2021 @ 5:55pm 
Originally posted by Gecko:
Originally posted by I'mDirtyDan:
HOW DO I CAP AT 60 fps ? also sorry for caaps

sorry for caps, and yet you didn't bother editing them out when you edited your comment lol
lol your right. i worked a 19 hour day today and i open tomorrow. im tired lol
Bandy (Banned) Jun 11, 2021 @ 4:46am 
Quick follow up, some say you can safely cap FO4 fps at 72, this may be so, give it a try and see if stable, if not then 60 fps cap is certain.

Originally posted by I'mDirtyDan:
how do i cap at 60 fps ?

If you have an nvidia GPU then use nvidia control panel to cap framerate, it is a powerful game tweaking tool giving you full access to GPU driver settings on a game-by-game basis. It is an easy tool to learn, but b/c you can access so many settings hard to master. Usually there are many online posts/vids that list CP (control panel) settings for each game.

Just make sure you make the setting changes just for the game.exe you want, not the global setting or you will lock all games to 60 fps for example, LOL...

If using the 'other' GPU brand there should be an equivalent tool, I just haven't used an AMD/Radeon card for over a decade.
Last edited by Bandy; Jun 11, 2021 @ 4:48am
I'mDirtyDan Jun 11, 2021 @ 6:31pm 
Originally posted by Bandy:
Quick follow up, some say you can safely cap FO4 fps at 72, this may be so, give it a try and see if stable, if not then 60 fps cap is certain.

Originally posted by I'mDirtyDan:
how do i cap at 60 fps ?

If you have an nvidia GPU then use nvidia control panel to cap framerate, it is a powerful game tweaking tool giving you full access to GPU driver settings on a game-by-game basis. It is an easy tool to learn, but b/c you can access so many settings hard to master. Usually there are many online posts/vids that list CP (control panel) settings for each game.

Just make sure you make the setting changes just for the game.exe you want, not the global setting or you will lock all games to 60 fps for example, LOL...

If using the 'other' GPU brand there should be an equivalent tool, I just haven't used an AMD/Radeon card for over a decade.
I followed your advice. it worked. but now the game ctds every few minutes. IS it a page memory issue or something?
Bandy (Banned) Jun 12, 2021 @ 3:54am 
System specs?
Turn off 'weapon debris' in game?
Can you play other or more demanding/recent games without issue?
Are you monitoring temps, just in case overheating issue?

Things that immediately rise to mind.
Last edited by Bandy; Jun 12, 2021 @ 3:56am
I'mDirtyDan Jun 12, 2021 @ 5:35am 
Originally posted by Bandy:
System specs?
Turn off 'weapon debris' in game?
Can you play other or more demanding/recent games without issue?
Are you monitoring temps, just in case overheating issue?

Things that immediately rise to mind.
yea. i checked everything. i can run metro exodus on ultra. i deleted everuthing system side and retrieed. no crash yet
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Date Posted: May 10, 2020 @ 1:01am
Posts: 21