Skip to content
FPS and graphics troubleshooting

Subnautica 2 Performance: Low FPS, Stutter & DLSS Settings

Find a stable graphics setup and work out which change actually helps your PC. Start with your symptom, then compare the same scene with one setting changed.

Quick answer. Update the game, check the published PC requirements and measure a short route with Frame Generation off. For low FPS, compare a lower resolution or preset; for hitches, repeat the same route and record when they happen. DLSS, Reflex and VSync have specific official fixes, listed below.

Reviewed 2026-10-08. Official patch references through Buddy System Hotfix 2. The comparisons below are troubleshooting advice, not a hardware benchmark.

Official Subnautica 2 Early Access feature artwork.

Low FPS or stutter: choose the matching symptom

Low FPS throughout normal play

Compare the same scene at a lower resolution or a lower render-scale preset, using only options your game exposes.

What the result tells you: A clear improvement points toward rendering load. Little change means you should also check CPU load, power limits and background work; it does not identify a single cause.

Short hitches while moving or entering an area

Repeat the same short route, then compare a separate session. Note whether the hitch repeats at the same location.

What the result tells you: An improved second pass is useful diagnostic information, but it cannot by itself distinguish shader work, asset streaming or another transient load.

High FPS counter but sluggish input

Compare with Frame Generation off, keeping resolution and upscaling unchanged.

What the result tells you: Generated frames can make motion look smoother without the same increase in game simulation or input updates. Record both responsiveness and the counter.

Flicker or instability with Reflex / VSync / Frame Generation

Install the current update, then change one of these toggles at a time and repeat the same scene.

What the result tells you: EA 1.2 specifically fixes Reflex / Frame Generation conflicts and particle flicker with VSync plus Reflex. A remaining issue needs the exact toggle combination.

Only one large base or old save runs badly

Compare another location in that save, then a separate new save on the same branch. Keep your original save.

What the result tells you: A difference narrows the report to the location or save state. Hotfix 1 removes leftover base data that contributed to save bloat, but does not promise a particular FPS gain.

Performance changed immediately after an update

Record the game build and driver version, then compare the same scene and graphics settings in a separate session.

What the result tells you: Unknown Worlds notes that outdated third-party modifications can cause crashes or unexpected behavior after a hotfix; that warning does not establish the cause of every performance change.

If the game crashes or never reaches a playable scene, use the crash and black-screen checklist first. Co-op connection failures belong in the co-op guide.

Graphics settings: a practical comparison order

Choose a short route you can repeat in the same save. Record the starting settings, change one variable, then compare. Available options depend on the hardware and game build.

1. Resolution / upscaling preset

Keep the output resolution fixed when comparing upscalers. Change one preset, then replay the same route.

Compare: FPS, image clarity in motion and tool or foliage artifacts.

2. Overall graphics preset

Start with a lower preset to establish a stable baseline. Raise it one level at a time once that baseline is usable.

Compare: Frame consistency as well as average FPS; record the actual preset name.

3. Individual quality options

After the preset comparison, test one available option at a time. Keep screenshots of your original settings.

Compare: Whether the visual improvement is worth its measured cost on your hardware. This page does not assign unmeasured FPS costs to individual settings.

4. Frame Generation

Establish a baseline with it off, then test a supported mode. RTX 5000-series Dynamic / 5x / 6x modes are covered below.

Compare: Responsiveness, image artifacts and stability alongside displayed FPS.

5. VSync and Nvidia Reflex

Record both states and whether Frame Generation uses a fixed multiplier or Dynamic mode. If a combination misbehaves, change one toggle and restart if requested.

Compare: Tearing, latency and repeatable flicker. Hotfix 2 disables VSync when DLSS Dynamic FrameGen is selected.

6. Laptop power and background apps

Use a consistent power mode and close optional recording tools or overlays for one comparison.

Compare: Whether the problem follows a background application or a power-state change. This is a diagnostic comparison, not a confirmed game-specific fix.

DLSS 4.5, Frame Generation, Reflex and VSync: confirmed changes

When testing Frame Generation, write down the multiplier and whether the FPS overlay includes generated frames. A larger displayed number alone does not prove lower input latency or a faster native render rate.

Check the actual PC requirements before choosing a target

The shared requirements below match our PC requirements page. Minimum and recommended labels are hardware baselines; we have not measured a guaranteed FPS result for either tier.

minimum

Processor
Intel Core i5-8400 / AMD Ryzen 5 2600
Memory
12 GB RAM
Graphics
GeForce GTX 1660 6GB / RX 5500 XT 6GB
DirectX
Version 12

recommended

Processor
Intel Core i7-13700 / AMD Ryzen 7 7700X
Memory
16 GB RAM
Graphics
GeForce RTX 3070 8GB / RX 6700 XT 8GB
DirectX
Version 12

For drivers, use the GPU manufacturer’s official release and record its version. If a problem began with a driver change, that timing belongs in the report; it does not establish which version is best for every player.

Make your FPS comparison useful

Copy this checklist into your notes before changing settings. Two results are only comparable when you know what changed between them.

Use the bug report guide if a problem repeats. EA 1.2 also lets the in-game feedback tool attach a save file, which can help the developer reproduce a save-specific issue.

Performance questions

What are the best settings for Subnautica 2?

Start with a lower graphics preset and compare the same route at your chosen resolution. Establish performance with Frame Generation off, then test available upscaling and Frame Generation options one at a time. There is no verified universal best-settings preset or GPU benchmark table on this page.

Can Subnautica 2 run at 60 FPS on my GPU?

The published minimum and recommended requirements do not establish a 60 FPS result for your resolution, save or build. Compare your PC with the requirements, then measure a repeatable route. Compare frame rate on the same route and graphics settings.

Does Subnautica 2 support DLSS 4.5?

Yes. Unknown Worlds’ Hotfix 3 notes say DLSS was upgraded to 4.5, with fixes for crashes, settings not saving and Frame Generation being unavailable in some game versions.

Why are Dynamic Frame Generation, 5x or 6x missing?

The Buddy System notes identify Dynamic Frame Generation and the 5x / 6x modes as RTX 5000-series features. They are not promised for every RTX GPU. Check the GPU, driver, game build and the options actually exposed in your settings menu.

Why does VSync turn off with DLSS Dynamic Frame Generation?

Buddy System Hotfix 2, released October 6, explicitly fixes VSync so it is disabled when DLSS Dynamic FrameGen is selected. EA 1.2 had added VSync compatibility with DLSS Frame Generation generally; Dynamic mode now has this specific behavior. Record the Frame Generation mode when comparing settings.

Should I ignore stutter during the first hour?

No. Record when it happens and whether it repeats on a second pass or after restarting. Shader compilation is one possible explanation; recurring stutter still warrants troubleshooting. Persistent, reproducible stutter is useful feedback.

Should I buy an SSD or a new GPU to fix stutter?

Diagnose the bottleneck first. A lower-resolution comparison, storage activity, memory use and the same route on a separate save provide more useful information than the symptom alone. Use those comparisons to identify which component is limiting the game before choosing an upgrade.

Do these settings apply to Steam Deck?

The method of comparing one setting at a time still helps, but Windows GPU drivers and Nvidia-only Frame Generation features are not Steam Deck instructions. Check the separate Steam Deck page and the current store compatibility information for handheld-specific context.

Sources and next steps