Skyrim, Fallout 4 and New Vegas: frame cap and V-Sync in NPI

Why these games need a cap

Community guides say Creation Engine physics follow the frame rate: above about 60 FPS items drop through floors or fly, and mods such as ENB add their own limiter because of it. COMMUNITY · STEP wiki, Steam threads We did not run a game to confirm it. Fallout: New Vegas uses an older engine and the same advice appears for it. The STEP ENB wiki also says limiting is neither necessary nor recommended when V-Sync is on, so V-Sync on a 60 Hz display is a cap in itself. COMMUNITY · STEP ENBLocal wiki

What NVIDIA already sets

NVIDIA ships a profile for each game. Skyrim SE has 4 settings, Fallout 4 has 12 and New Vegas has 14, and a few of them are worth noticing. LAB · driver 621.14 package

One row stands out. 0x10115C8B↗Copied (Whisper Mode Application FPS) is stored as 60 FPS in New Vegas and 40 FPS in Fallout 4 (the original Skyrim profile also stores 60). It belongs to NVIDIA’s Whisper Mode, the quiet laptop feature, and nothing proves it caps desktop frame rates. We list it so you are not surprised to see it. New Vegas also carries the DX9 antialiasing and AO bits discussed on the compatibility bits page.

The recipe per game

Each file contains one setting, 0x10835002↗Copied (Frame Rate Limiter V3) at 60, in NVIDIA’s own profile name. Import with Merge so NVIDIA’s other values stay, see the .nip page. Open a file in NIP Studio first. Their structure matches NPI’s format, but we did not load them in NPI.

Then, if you use ENB or a mod that turns off the game’s V-Sync, set 0x00A879CF↗Copied (Vertical Sync) to 0x47814940 · Force on and keep the in-game option off. Community posts split on this: some use “Use the 3D application setting” with a separate limiter, others force V-Sync. COMMUNITY · STEP forum A cap of 60 with V-Sync is right for a 60 Hz display. On a 144 Hz display, half the refresh rate is 72, which users say already causes problems, so 60 is the usual cap there. COMMUNITY · Nexus and STEP forums With G-SYNC, the cap calculator gives a value under your refresh rate.

If the game’s own V-Sync is on, the INI line that controls it is iPresentInterval in the game’s INI file; we did not verify which files each game reads, so check the game’s documentation before editing.

“The frame limiter does nothing in borderless”

We could not reproduce this. Users report the driver limiter breaking after alt-tab, needing a driver restart, or not holding in some window modes. COMMUNITY · Steam threads Things to try, in order: exclusive fullscreen, then a different limiter (ENB or an external tool), and make sure only one limiter is active. The frame limiter page compares them.

Mod loaders and the right exe

SKSE, F4SE and NVSE start the real game exe, and NVIDIA’s profile already includes it. Attach the process Task Manager shows while the game runs. The loader is not the game. The profile also contains launcher exes: Fallout 4’s profile lists fallout4launcher.exe and New Vegas’s lists falloutnvbeta.exe. LAB · driver 621.14 package The add-a-game page shows the Task Manager method.

Skyrim VR and Fallout 4 VR

NVIDIA ships Skyrim VR with a single setting, 0x80857A28↗Copied, and Fallout 4 VR with no settings at all. LAB · driver 621.14 package A driver frame cap fights the VR runtime’s own frame pacing, so we have no recommendation for VR and have not tested one.

When you no longer need NPI

High-FPS physics fix mods exist for these games, and one STEP forum user reported playing without V-Sync and without physics oddities with such a mod. COMMUNITY · STEP forum Mods and in-game caps can replace the driver cap. We do not endorse or redistribute any mod.

Undo

Select the profile and reset 0x10835002↗Copied and, if you changed it, 0x00A879CF↗Copied. The reset page has every method. Do not use Defaults on NVIDIA’s own profile unless you mean to clear its values too.

Questions people ask

Why cap Skyrim at 60 FPS?

Community guides say the game's physics run off the frame rate, so objects misbehave when it goes well above 60. Users describe items falling through floors. We could not reproduce this, as the lab has no GPU. A physics-fix mod is the other route.

Should I force V-Sync with ENB?

Several STEP forum posts say ENB can override the game's own V-Sync, so users force it in the driver. The sources disagree on the exact pairing, and the STEP ENB wiki says limiting FPS is not needed when V-Sync is on. Try Force on with a 60 Hz display first.

Why doesn't the NVIDIA frame limiter work in borderless in Fallout 4?

We could not reproduce it. Community users report a driver limiter breaking after alt-tab or in some window modes. Try exclusive fullscreen, an ENB limiter, or an external limiter, and use one limiter at a time.

Which exe do I add with SKSE?

Normally none. NVIDIA's profile already covers the game exe, and the script extender loaders start that exe. Check in Task Manager which process runs, and attach that one. The loader exe is not the game.

Sources

1. NVIDIA driver 621.14 predefined profile database nvidia.com · accessed 8 Nov 2026 · official
2. STEP stepmodifications.org · accessed 8 Nov 2026 · community
3. Nexus forums forums.nexusmods.com · accessed 8 Nov 2026 · community

Keep going

• hubGamesThe games database
• howtoFrame rate limiterFrame Rate Limiter V3
• howtoG-SYNC, V-Sync and low latency settingsV-Sync, G-SYNC and the cap calculator
• howtoCreate a profile / add a game .exeAdd a game exe
• howtoCompatibility bitsAA and AO bits for these older games