Best Fallout 4 Settings on the Steam Deck

Short version: Fallout 4 is Deck Verified, and community reports put it around 45 fps on the Steam Deck at the default resolution. That is not a number Bethesda's engine hands you locked — it is roughly where the hardware settles out in the Commonwealth. The job is not to chase 60, which this engine was never going to hold cleanly here. It is to make that 45 stable: cap the frame rate, cut the two sliders that hurt in Boston, and trim power draw.

A note on honesty: the 45 fps above is community-measured, from a single report at the default resolution. It is not a benchmark we ran, and it is an average rather than a floor. Nothing below claims a per-setting fps gain, because we have not measured one — the settings advice is general Deck practice for this engine's well-known costs.

Cap the frame rate first

Do this before touching an in-game slider. Fallout 4 runs on the same Creation Engine lineage as Skyrim, which ties physics and some scripting to frame rate. An uncapped or wildly swinging fps is not just a comfort problem — it produces genuine jank in havok objects and terminal interactions.

1. Launch Fallout 4 once, reach the main menu, then back out to the Steam UI.
2. Open Quick Access (the … button) → Performance tab.
3. Enable Use per-game profile.
4. Set Framerate Limit to 40 fps (45 fps on the OLED).
5. Set Refresh Rate to 40 Hz (45 Hz on the OLED).

Capping at 40 rather than floating near 45 gives you a number the Deck can hold evenly, and the matching 40 Hz refresh gives flat, judder-free pacing instead of an awkward 45 on a 60 Hz screen. That 40 Hz step belongs to the LCD, whose slider runs 40–60 Hz; the OLED's runs 45–90 Hz, so there the even pairing is 45 fps at 45 Hz. A 45 fps cap works on either model if you would rather ride the measured ceiling — just expect more variance downtown.

In-game graphics settings

Open Settings → Display in-game. Fallout 4's frame budget goes to shadows, godrays, and downtown Boston's object density. That is where to spend it.

• Detail preset: Medium as a starting point, then adjust individually below.
• Resolution: leave it at the Deck's native 800p (1280×800).
• Shadow Quality / Shadow Distance: Medium to Low. The single biggest lever in the menu — Fallout 4's shadow rendering is old and expensive for what it returns.
• Godrays Quality: Low. The most notorious frame-eater in this engine, and it buys nothing on a 7-inch screen.
• Distant Object Detail / Object Fade: Medium. Full draw distance across the wasteland is a real cost and you will not miss the far-off pop-in in handheld play.
• Texture Quality: High is fine. The Deck's 16 GB of unified memory handles Fallout 4's textures comfortably and they are cheap on frame time.
• Antialiasing: TAA. It cleans up a lot of the Creation Engine's foliage shimmer.
• Screen Space Reflections / Wetness: Low or Off. Rain-slick surfaces are a quiet cost for a small payoff.
• Motion Blur: Off. Sharper at a capped frame rate, and taste either way.

Downtown Boston, Diamond City, and any settlement with several settlers and turrets active are where these earn their keep. The open Commonwealth runs noticeably easier.

Upscaling on Deck

Fallout 4 has no built-in upscaler — there is no FSR toggle in its menu and the next-gen update did not add one. The upscaling you can use lives in SteamOS instead: drop the in-game resolution one step below native, then in Quick Access → Performance set the Scaling Filter to FSR and tune its sharpness. That hands the reconstruction to the system compositor and buys headroom in the city without the mush of plain bilinear stretching.

TDP and battery tips

With a 40 fps cap in place there is room under the Deck's 15 W ceiling.

• TDP Limit: try 9–10 W. Once shadows and godrays are trimmed this is not a punishing GPU load.
• GPU Clock: leave it automatic first. Only set a manual clock if the frame rate wobbles at your chosen TDP.
• Screen brightness: drop it a notch, especially in interiors and Vaults. Easy win on both models.

Want to go deeper? The Fallout 4 game page has the full verdict across all three SteamOS devices, the Steam Deck hub covers everything else we have rated for the handheld, and the RPG hub has more picks in the same vein.