Boot Fallout 4 on Steam Deck today and there’s a good chance you never see a graphics menu at all. That’s not a bug on your end — Bethesda’s April 2024 “next-gen” update stripped the launcher that used to hold every visual setting, specifically to qualify the game for Valve’s “Deck Verified” badge. Two years and an Anniversary Edition later, that fix still hasn’t shipped, so every settings guide that starts with “set Shadow Distance to Medium” is skipping the step that makes the rest of the guide reachable.
This guide starts there, then covers the config that actually holds 40 FPS on Steam Deck, the physics bug that explains why you don’t want to just uncap the frame rate, and the 40Hz refresh-rate pairing that turns a stable frame rate into real battery life instead of just a smoother stutter.
Fix the Missing Settings Menu First
Fallout 4’s in-game options screen is gone on Steam Deck because the game auto-detects the hardware and assumes you don’t need one. You get it back by lying to that detection:
- From Gaming Mode, highlight Fallout 4 and press the … (three-dot) button.
- Open Properties.
- Under Launch Options, type:
SteamDeck=0 %command% - Launch the game — the old graphics menu now appears before the main menu loads.
This isn’t a workaround you apply once and forget. It masks the Steam Deck identifier from the game every single launch, which is also why it technically contradicts the Verified badge Bethesda was chasing when it removed the menu in the first place [1][2]. It’s still the only reliable way to reach shadow distance, godrays, or any other setting below — skip it and you’re stuck with whatever the game auto-selected.
The Best Fallout 4 Settings for Steam Deck
Once the menu is back, this is the config that gets the closest to a stable 40 FPS without turning the Commonwealth into a smear of low-res textures. It reconciles the graphics guides that are currently live — they agree on the settings that matter and disagree mainly on Godrays, which costs more than most give it credit for in open areas like Sanctuary Hills or the Glowing Sea:
| Setting | Value | Why |
|---|---|---|
| Resolution | 1280×800 (native) | Matches the Deck’s panel exactly — no scaling cost |
| Texture Quality | High | Ultra adds VRAM pressure with no visible gain at this screen size |
| Shadow Quality | Medium | Shadow settings have the single biggest FPS impact in this game |
| Shadow Distance | Medium | Same reason — High tanks FPS hardest in dense settlements |
| Godrays | Off (Low if you have headroom) | Disproportionately expensive in open, sunlit areas |
| Ambient Occlusion | SSAO | Cheap visual gain, minimal cost |
| Screen Space Reflections | Off | Barely noticeable on a 7-inch screen, costs real frames |
| Motion Blur | Off | No performance cost either way — purely a clarity preference |
| Anti-Aliasing | TAA | Best quality-to-cost ratio at native resolution |
Pair those with a 10W TDP limit and FSR enabled if you dock to a TV — the combination is what the current round of settings guides converge on for holding 40-50 FPS in the field, with dips into the high 30s in Diamond City and other dense interiors [1][2][3]. Docked play changes the math slightly: you’re rendering at 1280×720 instead of the handheld’s native 800p, and without FSR upscaling to cover the gap, that extra resolution eats most of the headroom the dock’s power delivery buys you. Leave FSR on any time you’re docked to a TV — the image-quality cost is minor at typical couch viewing distance, and skipping it is the single most common reason docked play performs worse than handheld play with an identical settings file.
Advanced: A Few INI Tweaks Worth the Extra Ten Minutes
The in-game menu above covers most of the FPS budget, but two changes to Fallout4Custom.ini (in Desktop Mode, under Documents/My Games/Fallout4) squeeze out a bit more without touching visual quality: setting iNumHWThreads=3 under a [Performance] section better matches the Deck’s Zen 2 core count than the PC-oriented default, and uGridsToLoad=5 trims the object-loading radius in a way that’s barely perceptible at handheld screen size but noticeably reduces stutter when fast-traveling into dense areas [1]. Neither is required — the graphics-menu settings above get you to a stable 40 FPS on their own — but both are safe, reversible text edits rather than mods, which makes them worth the ten minutes for anyone already comfortable with Desktop Mode.
Why 40 FPS, Not 30 or 60
There’s a reason nobody serious recommends uncapping Fallout 4’s frame rate on Steam Deck, and it’s not just battery life. Fallout 4’s physics and animation systems are widely documented to be tied directly to frame rate — the engine was built around a 60 FPS ceiling, and Bethesda never added a hard limiter. Players who’ve pushed past 60 report lock-picking, terminal hacking, and dialogue timing desyncing, plus load-time scripts that expect a 60 FPS clock behaving erratically [12]. On Steam Deck specifically, Valve’s own Proton Hotfix (April 2024) works around this by silently forcing dxgi.maxFrameRate=60 at the Proton layer, regardless of what your in-game or Deck-side frame limit says [6][11]. That cap exists to protect you from the exact bug above — advanced users who want to push toward the OLED’s 90Hz panel can override it with a dxvk.conf file in the game’s install folder (dxgi.maxFrameRate = 90), but you’re then trusting mods like High FPS Physics Fix to catch what Bethesda’s engine won’t [11][12].
40 FPS sits in the sweet spot: high enough to feel meaningfully smoother than 30, nowhere near the 60 FPS line where the physics engine starts arguing with itself.
Match 40Hz Refresh to Your 40 FPS Cap
Capping the game at 40 FPS while your screen keeps refreshing at 60Hz doesn’t just look judder-prone — it wastes battery you already earned by lowering the frame rate. 40 doesn’t divide evenly into 60, so the display re-shows stale frames unevenly to keep up, which is the visual stutter every Deck owner has seen on a “stable” 40 FPS cap [7]. Steam Deck’s fix is a 40Hz refresh mode — added system-wide via a SteamOS update, not an OLED-exclusive hardware feature, so it’s available on the original LCD model too [13]:
- In-game, open the Quick Access Menu (… button).
- Go to Performance.
- Set Refresh Rate to 40Hz.
- Set Framerate Limit to 40 FPS.
- Toggle Use Per-Game Profile so this doesn’t change your refresh rate system-wide [8].
Once the panel refreshes at exactly 40Hz, every rendered frame lands on a screen refresh instead of getting dropped or duplicated — that’s what actually delivers the battery gain, not the lower frame rate on its own [7]. We used the identical 40Hz/40 FPS pairing for our Elden Ring Steam Deck settings, and it holds up the same way there: a demanding game gets a real efficiency gain instead of just a lower frame-rate ceiling.
Settings by Player Type
“Best settings” isn’t one config — what you’re optimizing for changes the answer:
| Player Type | Priority | Adjustment |
|---|---|---|
| New player | Reliability over visuals | Use the table above as-is; don’t touch the dxvk.conf override — it exists for a reason you don’t need yet |
| Casual player | Longest possible session | Drop TDP to 8W and Shadow Quality to Low; expect closer to 45-50 FPS with a real battery gain over the 10W config |
| Hardcore / optimizer | Maximum stable frame rate | Keep the 40Hz/40 FPS pairing but raise Texture Quality to Ultra if you’re plugged into a dock — VRAM headroom exists, GPU headroom mostly doesn’t |
| Completionist / modder | Full visual + mod stack | Install High FPS Physics Fix before touching any frame-rate override, and stay under the game’s mod-archive cap (raised to 1,024 in the August 2026 patch) [10] |
Realistic Battery Life
Battery-life claims for this exact config range from roughly 2 hours to over 4, and the gap isn’t guides disagreeing — it’s different TDP and refresh combinations being tested under the same headline settings [1][3]. Here’s what actually drives the difference:
| Config | Expected Runtime |
|---|---|
| 10W TDP, 60Hz refresh, uncapped in-game FPS | ~2 hours — the config most “battery is bad” reports are actually running |
| 10W TDP, 40Hz refresh, 40 FPS cap | ~3-3.5 hours |
| 8W TDP, 40Hz refresh, 40 FPS cap, brightness ~40% | 4+ hours |
The 40Hz/40 FPS pairing above is what moves you from the first row to the second — the TDP and brightness trims in the player-type table are what get you the rest of the way.
FAQ
Should I turn Godrays on or off?
Off, unless you’re specifically in an indoor-heavy playthrough. Godrays cost more in Fallout 4’s open, sunlit areas than shadow distance does in most interiors — the guides recommending “Low” are usually testing in the Glowing Sea or Sanctuary, where the setting is cheapest to enable, not in the Commonwealth’s more typical open terrain.
Is the dxvk.conf frame-rate override worth using?
Only if you’re already running a mod like High FPS Physics Fix. Removing the Proton Hotfix’s 60 FPS ceiling without it reintroduces the exact desync bugs — broken lock-picking, terminal glitches, dialogue timing — that the cap exists to prevent. It’s a genuine option for the completionist/modder tier, a trap for everyone else.
Why does my battery life look worse than the numbers here?
Check your refresh rate before anything else. Running a 40 FPS in-game cap against a 60Hz screen refresh is the single most common mismatch — you get the judder without the battery gain, since the panel is still refreshing 20 more times a second than your game is rendering.
Does this differ much from lighter games like Stardew Valley?
Considerably. Our Stardew Valley Steam Deck settings hold 60 FPS at a fraction of this TDP because the game simply isn’t pushing the GPU — Fallout 4’s Commonwealth is a different power budget entirely, which is why the 40Hz pairing matters here in a way it never would there.
Version note: Verified against Fallout 4’s August 18, 2026 patch (mod-archive limit raised to 1,024, Steam Deck virtual-keyboard crash fix) and the November 2025 Anniversary Edition, which Bethesda has confirmed left “performance characteristics and technical features unchanged” [9][10]. None of the settings above have shifted since. For the wider Steam Deck optimization framework this guide builds on, see our PC and Steam Deck settings hub.
Sources
- Slayercruise — Fallout 4 On Steam Deck: The Ultimate Settings Guide For 2026
- BenQ Knowledge Center — Fallout 4 Steam Deck Settings: Best Performance & FPS Optimization
- RetroResolve — Fallout 4: Steam Deck Performance and Recommended Settings
- Steam Deck HQ — Fallout 4 Loses Graphical Options on Steam Deck From “Next-Gen” Update
- Kotaku — Fallout 4’s New Update Removes Graphical Settings On Steam Deck
- Steam Deck HQ — Proton Hotfix Released to Fix Fallout 4 Frame Pacing Issues on Steam Deck
- GameRant — Steam Deck Gets 40Hz Refresh Rate, Improving Framerate Stability and Battery Life
- Dexerto — How to set the Steam Deck to 40Hz and 40FPS
- Hack the Minotaur — Fallout 4 Anniversary Edition Update Explained
- ComicBook.com — Fallout 4 Gets New Update for August 2026, Here Are the Full Patch Notes
- Steam Community — Fallout 4, new Proton Hotfix and FPS issues
- Steam Community — Physics still linked to framerate (Fallout 4 General Discussions)
- GSMArena — SteamOS 3.2 update adds refresh rate settings, quieter fan curve to the Steam Deck
I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.