protonscr

Fallout new vegas Fps cap at 2k is 120 with nvr but at 4k its 144. No fps clamping solution can fix this at 2k.

dxvkopen windows
doitsujin/dxvk#5620 · opened 2026-05-06 by Broskisaurus · updated 2026-06-13 · 16 comments · github
BBroskisaurus 2026-05-06 github

Please describe your issue as accurately as possible. Include screenshots or videos when relevant.

If you use Windows, please check the following page: https://github.com/doitsujin/dxvk/wiki/Windows

Software information

Name of the game, settings used etc. Include any mods or add-ons if applicable.

System information

  • GPU: RTX4080S
  • Driver: 596.36
  • Wine version:
  • DXVK version: 2.7.1

Apitrace file(s)

  • Put a link here

For instructions on how to use apitrace, see: https://github.com/doitsujin/dxvk/wiki/Using-Apitrace

Log files

Please attach Proton or Wine logs as a text file:

  • When using Proton, set the Steam launch options for your game to PROTON_LOG=1 %command% and attach the corresponding steam-xxxxx.log file in your home directory.
  • When using regular Wine, use wine game.exe > game.log 2>&1 and attach the resulting game.log file.
  • On Windows, DXVK log files will usually appear next to the games exe or in its base folder.
BBroskisaurus 2026-05-06 github

Fps wont budge past 120 at 2k in fnv using nvr, at 4k its fine and clamps and works as intended, i tried 2k to get more perfomance but i cannot get past 120 fps.

BBroskisaurus 2026-05-06 github

changing my monitor res to 2k fixes this, but its strange that at 4k monitor settings the game clamps fps to 120 :/

BBlisto91 2026-05-06 github

I assume this is because your monitor refresh rate changes with the resolution and then the game vsyncs to it

BBroskisaurus 2026-05-06 github

i checked, this is not the case, when im at 4k my monitor is at 144hz, but ingame it clamps to 120, its very strange.

BBlisto91 2026-05-06 github

Post a dxvk log with it set to 4k

BBroskisaurus 2026-05-06 github

can you please guide me on how to generate this log?

BBlisto91 2026-05-06 github

It's in the issue template above

On Windows, DXVK log files will usually appear next to the games exe or in its base folder.

will be called (exename)_d3d9.log

BBroskisaurus 2026-05-06 github
BBlisto91 2026-05-06 github

I assume this doesn't happen with native d3d9?

Try adding d3d9.maxFrameRate = -1 in the dxvk.conf file

BBroskisaurus 2026-05-06 github

Doesn't happen on native d3d9, adding the setting doesn't change anything unfortunately.

BBlisto91 2026-05-06 github

And with d3d9.presentInterval = 0 ?

BBroskisaurus 2026-05-06 github

still the same

BBroskisaurus 2026-05-06 github

So far i've tried setting a fps cap in nvidia app control, RTSS, Nvtf, Nvr itself. still locked at 120

BBlisto91 2026-05-06 github

Can you post a new log with the configs above added?

BBroskisaurus 2026-05-06 github
Mmirh 2026-06-13 github

Can you confirm that in both 1440p and 4K the actual frequency is 144Hz and not some lower or wacky value like 143,99Hz?
Does setting dxvk.allowFse = True makes any difference? What if you try some older dxvk version like 2.3.1 or 1.10.3?

Launch options