🎮 Quick Answer — Subnautica 2 Streaming
Use NVENC H.264 encoder, 6000–8000 Kbps bitrate, 1080p 60fps, P5 preset, and CBR rate control. In-game, enable DLSS Quality or FSR Quality to free up GPU headroom for OBS. Subnautica 2 runs on Unreal Engine 5 — it is GPU-heavy, so hardware encoding is essential.
Recommended OBS Settings for Subnautica 2
Subnautica 2 launched on May 14, 2026 in Early Access on Unreal Engine 5. The game features dense underwater biomes, volumetric lighting, Lumen global illumination, and heavy particle effects — all of which put significant load on your GPU. The key to a smooth stream is using hardware encoding (NVENC/AMF) so OBS does not compete with the game for CPU resources.
| Setting | Twitch | YouTube / Kick |
|---|---|---|
| Encoder | NVENC H.264 (NVIDIA) / AMF H.264 (AMD) | NVENC AV1 (RTX 40-series) / AMF AV1 |
| Resolution | 1920×1080 | 1920×1080 |
| Frame Rate | 60 fps | 60 fps |
| Bitrate | 6000–8000 Kbps | 9000–12000 Kbps |
| Rate Control | CBR | CBR |
| Keyframe Interval | 2 seconds | 2 seconds |
| NVENC Preset | P5 (Quality) | P5 or P6 (Quality) |
| Tuning | High Quality | High Quality |
| B-Frames | 2 | 2 |
Subnautica 2's underwater environments have complex lighting and particle effects that compress poorly at low bitrates. Using 8000 Kbps (Twitch's increased cap) or higher on YouTube will prevent blocky visuals in dark cave scenes and particle-heavy areas.
⚙️ Get Custom Settings for Your GPU
Open Settings Generator →Why Subnautica 2 Is Hard to Stream (UE5 Explained)
Unlike previous Subnautica titles, Subnautica 2 uses Unreal Engine 5 with Lumen and Nanite enabled. Here is why this makes streaming harder:
- Lumen Global Illumination — Dynamic real-time lighting is extremely GPU-intensive. It can spike GPU usage to 95-100%, leaving no headroom for OBS.
- Nanite Geometry — Millions of micro-polygons for detailed rock formations and coral stress your VRAM bandwidth.
- Shader Compilation Stutter — On first launch or after driver updates, UE5 games stutter while compiling shaders. This is normal and resolves after 5-10 minutes.
- Texture Streaming — Biome transitions can cause VRAM spikes, especially on 8GB GPUs.
⚠️ If You Are Getting Dropped Frames or Stutter
This is almost always caused by GPU overload. Fix it by: (1) enabling DLSS Quality or FSR Quality in-game, (2) lowering Global Illumination to Medium or Low, (3) reducing Shadow Quality, and (4) capping your in-game FPS to 120 via the game's FPS limiter.
In-Game Settings for Streaming Subnautica 2
Optimizing Subnautica 2's own graphics settings is just as important as your OBS settings. These changes free up GPU resources so OBS can encode without causing stuttering:
| In-Game Setting | Recommended Value | Why |
|---|---|---|
| Upscaling (DLSS/FSR) | Quality mode | Renders at lower resolution, upscales — major FPS boost |
| Global Illumination | Medium | Lumen is the #1 GPU hog — reduce it first |
| Shadow Quality | Medium or Low | Reduces GPU load significantly in dense biomes |
| Texture Quality | Match your VRAM (8GB GPU = Medium) | Prevents VRAM overflow during biome transitions |
| Frame Generation | Off (while streaming) | Can conflict with OBS capture and add latency |
| Motion Blur | Off | Reduces encoding complexity — cleaner stream |
| FPS Cap | 120 or 144 | Prevents GPU pegging at 100% from uncapped frames |
GPU-Specific Recommendations
Subnautica 2 requires a dedicated GPU. Here are quick settings per GPU tier:
| GPU Tier | Examples | Resolution | In-Game Quality |
|---|---|---|---|
| S Tier | RTX 4080, 4090, RX 7900 XTX | 1080p or 1440p 60fps | Ultra — DLSS Performance off |
| A Tier | RTX 4070, 3080, RX 7800 XT | 1080p 60fps | High — DLSS Quality |
| B Tier | RTX 4060, 3070, RX 7600 | 1080p 60fps | Medium-High — DLSS Quality |
| C Tier | GTX 1660 Super, RTX 3060, RX 6600 | 720p 60fps | Medium — FSR Quality |
Check your specific GPU's streaming capability for Subnautica 2:
FAQ — Subnautica 2 OBS Streaming
What are the best OBS settings for Subnautica 2?
NVENC H.264 encoder, 6000–8000 Kbps, 1080p 60fps, P5 preset, CBR rate control. Enable DLSS Quality in-game to free up GPU resources for OBS encoding.
Why does Subnautica 2 stutter when I stream?
Unreal Engine 5's Lumen lighting and Nanite geometry push GPUs hard. Enable DLSS/FSR Quality mode, lower Global Illumination to Medium, and cap your in-game FPS at 120. If stutter persists after the first 10 minutes of gameplay, it is likely shader compilation — it will stop on its own.
Should I use NVENC or x264 for Subnautica 2?
Always use NVENC (or AMF for AMD GPUs) for Subnautica 2. The game uses so much GPU already that x264 CPU encoding adds additional load and will cause dropped frames or stuttering. Hardware encoding offloads the video compression to a dedicated chip on your GPU, leaving your CPU and GPU free for the game.
Can I stream Subnautica 2 on a low-end PC?
If you have a GTX 1660 Super or lower, stream at 720p 60fps instead of 1080p. Use FSR Quality mode in-game, set all graphics to Medium, and use NVENC Performance preset in OBS. The game is demanding but manageable at reduced quality settings.
What bitrate should I use for Subnautica 2 on Twitch?
Use 6000–8000 Kbps on Twitch. Subnautica 2's dark underwater caves and particle effects compress poorly at low bitrates, causing visible artifacts. Higher bitrate = cleaner stream in complex scenes.