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Best Subnautica 2 settings for the NVIDIA RTX 3090 Ti (2026)

On a NVIDIA RTX 3090 Ti (paired with a balanced Intel Core i9-12900F-class CPU), Subnautica 2 runs at roughly 68 FPS at 4K with our optimized settings — up from about 68FPS with everything maxed. Here's the configuration and what each setting costs.

The NVIDIA RTX 3090 Ti is a high-end graphics card with 24GB of VRAM, and Subnautica 2 is a moderately demanding game. Paired with the Intel Core i9-12900F, it runs well at 4K — about 68 FPS with FrameCoach's optimized settings. That already clears a smooth frame rate on High, so our tuning keeps the visuals as high as possible instead of chasing extra frames.

Across resolutions you can expect around 199 FPS at 1080p and 119 FPS at 1440p, dropping to roughly 68 FPS at 4K. Its 24GB of VRAM is plenty for Subnautica 2, so textures can stay maxed. The biggest free win is DLSS upscaling — set it to Quality for a large FPS boost at little visual cost.

ResolutionAll-High FPSOptimized FPS
1080p199199
1440p119119
4K6868
💡 Subnautica 2: Early-access Unreal Engine 5 - Lumen Global Illumination is the heaviest setting; upscaling helps a lot.
Recommended settings
Upscaling — DLSSOff
Subnautica 2 (Unity) supports Nvidia DLSS plus Frame Generation - there is currently no FSR for AMD/Intel. Enable it first for a big, low-cost FPS gain.
CloudsMediumbaseline
Volumetric clouds above the surface - can drain ~20 FPS at Epic. Medium is a big saving with little loss.
View / Detail DistanceHighbaseline
How far terrain and props render. Lower it a notch first if you dip in open water.
Shadow QualityHighbaseline
Shadow resolution and range. High is a strong step down from Epic.
Water & Caustics QualityMediumbaseline
The shimmering light patterns and water detail that define the look. Medium keeps the vibe while saving frames.
Flora / Foliage DensityMediumbaseline
Density of coral and plant life. Lower it for steadier FPS in dense reefs.
Effects QualityMediumbaseline
Particles, bubbles and volumetrics. Medium is plenty.
Texture QualityHighbaseline
Surface detail — cheap on FPS if it fits your VRAM.

⚡ Fine-tune this for your exact CPU & target FPS →

🎯 Can the NVIDIA RTX 3090 Ti run Subnautica 2? See the verdict →

Subnautica 2 on other GPUs
Other games on the NVIDIA RTX 3090 Ti
Frequently asked

What FPS does the NVIDIA RTX 3090 Ti get in Subnautica 2?

With FrameCoach's optimized balanced settings, the NVIDIA RTX 3090 Ti averages around 68 FPS at 4K in Subnautica 2 — up from about 68 FPS with everything on High.

Can the NVIDIA RTX 3090 Ti run Subnautica 2 at 1440p?

At 1440p with optimized settings, the NVIDIA RTX 3090 Ti averages roughly 119 FPS in Subnautica 2 — a smooth experience.

What are the best Subnautica 2 settings for the NVIDIA RTX 3090 Ti?

Use a balanced preset, keep ray tracing off for maximum FPS, and ease the heaviest options like Clouds and View / Detail Distance down a notch. The full per-setting breakdown is above.

FPS figures are estimates from a generalized model (hardware tier × game load × per-setting weights), not live benchmarks — real performance varies by scene, drivers and game version.