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RTX 3080 20GB (modded) for MiniMax H3: Speed, VRAM & Recommended Setup
| Size (16:9) | 5s | 8s | 10s | 15s |
|---|---|---|---|---|
| 416 × 256 0.1MP · flicker-prone | 57 s VRAM 17G | 1 min 5 s VRAM 17G | 1 min 11 s VRAM 18G | 1 min 26 s VRAM 18G |
| 864 × 480 0.4MP | 1 min 40 s VRAM 19G | 2 min 19 s VRAM 19G | 2 min 51 s VRAM 19G | 4 min 27 s VRAM 19G |
| 960 × 544 0.5MP | 1 min 56 s VRAM 19G | 2 min 53 s VRAM 19G | 3 min 38 s VRAM 19G | 5 min 58 s VRAM 19G |
| 1152 × 640 0.7MP | 2 min 34 s VRAM 19G | 4 min 11 s VRAM 19G | 5 min 31 s VRAM 19G | 9 min 53 s VRAM 19G |
| 1344 × 768 1.0MP · official max | 3 min 37 s VRAM 19G | 6 min 27 s VRAM 19G | 8 min 54 s VRAM 19G | 17 min 34 s VRAM 19G |
| 1376 × 768 1.0MP · above native | 3 min 43 s VRAM 19G | 6 min 40 s VRAM 19G | 9 min 14 s VRAM 19G | 18 min 20 s VRAM 19G |
| 1920 × 1088 2.0MP · above native | 9 min 14 s VRAM 19G | 20 min 29 s VRAM 19G | 31 min 38 s VRAM 19G | 1.3 h VRAM 19G |
Times are per whole clip (model load and text encoding included); the first run is slower due to kernel compilation. ⚠ = weight offloading / noticeably slower; ✕ = not recommended.
Reading the numbers
With the recommended combo, the green (no disk spill) ceiling is 1920 × 1088 · 15s at ~1.3 h per clip. To unlock 2.0MP and full durations: step up to a 32GB card (e.g. 5090), or use a smaller quant (GGUF Q3/Q4).
Recommended combo (Blackwell-specific (50-series 16GB+))
- Main model: MiniMax-H3_FL2VA-NVFP4-HQ.safetensors（DmitryDB）（14.6GB）
- Text encoder: qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors（15.69GB）
- Acceleration: LightX2V Turbo 4-step v1.1 768p · ~3.44× sampling
- Launch flags:
--fast-disk
768p 5s; 4-8 steps; 1-5 min per clip
FAQ
Can the RTX 3080 20GB (modded) run MiniMax H3?
Yes. Estimated with 32GB RAM + fast-disk: 1920×1088·15s at ~1.3 h per clip. Configs that exceed VRAM fall back to weight offloading (slower, but they still render).
How fast is H3 on the RTX 3080 20GB (modded)?
About 1.3 h per 1920×1088·15s clip (including model load and encoding). Longer or denser clips scale quadratically in the attention term.
How much RAM do I need?
At least 64GB of system RAM recommended (minimum 32GB plus a 16GB pagefile). With 32GB, always enable --fast-disk or weights spill into the pagefile.
How can I make it faster?
Stack step distillation (e.g. LightX2V Turbo 4-step v1.1 768p), enable SageAttention / Kitchen attention; for long clips try SLA / VSA sparse attention. All of it is switchable in step 2 of the calculator.
→ Run the numbers for your RAM and budget in the calculator (RTX 3080 20GB (modded) pre-filled)
Same tier: RTX 3070 Ti 8GB · RTX 3080 10GB · RTX 3080 12GB · RTX 3080 Ti 12GB · RTX 4060 Ti 16GB · RTX 4070 12GB · RTX 4070 Super 12GB · RTX 4070 Ti 12GB
Related: Hardware guide · Acceleration compared · 8GB VRAM setups