Quick answer
Update the game, restart the store client, and confirm your PC is at least near the official Steam requirements before changing graphics. For low FPS, set a frame cap first, lower shadows, effects, post-processing, and view distance before textures, then test DLSS or Frame Generation one at a time on supported NVIDIA hardware. If the problem appears only near a base, during co-op, or after a handheld heats up, treat that as a separate load problem instead of copying someone else’s preset.
What changes first
Frame cap before visual chasing
A stable 40 or 60 FPS target usually feels better than a higher number that drops every time a base, vehicle, or creature enters the scene.
DLSS changed after Hotfix 3
Unknown Worlds listed DLSS crashes, saved DLSS settings, Frame Generation availability, and a DLSS 4.5 upgrade in Hotfix 3. Test the patched build before trusting older advice.
Busy areas are their own benchmark
A quiet swim and a crowded base are not the same workload. Use both when testing settings, otherwise you may tune the game for the wrong moment.
Visual notes and source media
Original route art
Abyss Guides uses original chibi deep-sea art for page visuals instead of copying wiki screenshots or fan uploads.
Source: Abyss Guides original artwork
Official Subnautica 2 gameplay trailer
Use the trailer for mood, vehicles, and biome context. Do not treat trailer scenes as exact farming coordinates.
Source: Official Subnautica YouTube embedHow to tune Subnautica 2 without guessing
Start from the official hardware baseline
The Steam page is the first reality check. If a PC is below the listed CPU, GPU, RAM, DirectX 12, or storage expectations, aggressive graphics settings will not turn it into a recommended-spec machine.
Set the frame target
Choose the number you can hold in a real play area. On desktop, 60 FPS is a reasonable first target. On handhelds or weaker laptops, 30 or 40 FPS can be the better call because heat and battery drain matter.
Lower the settings that hurt motion first
Shadows, effects, post-processing, and view distance tend to show up during motion, wide views, particles, and base lighting. Lower them one step at a time and retest the same short route.
Leave textures until you see memory pressure
Textures affect sharpness, but lowering them too early can make the game look worse without fixing the real stutter. Treat textures as a VRAM or shared-memory fix, not the first slider to touch.
Retest DLSS after the patch
If your GPU supports DLSS, test Quality or Balanced after Hotfix 3, then restart and check whether the setting sticks. Turn Frame Generation on only as its own test, not during a batch of five other changes.
Check co-op and base load separately
If FPS is fine solo but poor when hosting friends, write that down. If it is fine in open water but dips near storage, lights, and vehicles, you are tuning base load, not the whole game.
Preset field card
First target
Stable FPS
Choose a cap the device can hold while moving.
First sliders
Light load
Shadows, effects, post-processing, and view distance.
Retest zone
Base loop
Compare quiet water against your busiest base.
Settings order
| Setting or test | What to do first |
|---|---|
| Frame cap | Start with 60 FPS on desktop, 40 or 30 FPS on handhelds and weaker laptops. |
| Shadows | Lower early if bases, caves, or artificial lights cause dips. |
| Effects | Lower if particles, bubbles, storms, or creature-heavy scenes stutter. |
| Post-processing | Drop one step if motion feels smeary or camera turns spike frame time. |
| View distance | Lower for open water dips, then retest the same travel route. |
| Textures | Adjust later if VRAM or shared memory looks like the limit. |
| DLSS and Frame Generation | Use only on supported NVIDIA hardware and test after Hotfix 3. |
Do not copy a universal “best preset”
Two players can have the same average FPS and completely different pain points. One may be GPU-limited in open water, another may dip only near a base, and a handheld may be heat-limited after twenty minutes. Copy the order, not the exact numbers.
FAQ
What settings should I lower first for low FPS?
Start with a frame cap, then lower shadows, effects, post-processing, and view distance. Save textures for VRAM or shared-memory problems.
Should I use DLSS in Subnautica 2?
Use DLSS only if your GPU supports it, and retest after Hotfix 3 because the official notes changed the DLSS baseline. Do not test DLSS and Frame Generation at the same time as five other settings.
Is Subnautica 2 low FPS a bug?
Sometimes, but not always. Early Access performance can change, yet bases, co-op hosting, heat, overlays, drivers, and below-spec hardware can all look like a bug at first glance.
Should Steam Deck use the same settings as a desktop PC?
No. A handheld needs a frame cap, heat control, and battery-aware settings. Start with the Steam Deck page if that is your main device.