RTX 5080 16GB for MiniMax H3: Speed, VRAM & Recommended Setup

16GB GDDR7 · bandwidth 960 GB/s · Blackwell · sm_120 · estimated with 32GB RAM / fast-disk · updated 2026-09-28

Verdict: Recommended: 1920 × 1088 · 15s, ~49 min 25 s per clip (VRAM peak ~15GB). See the table for higher tiers.

Size (16:9)	5s	8s	10s	15s
416 × 256 0.1MP · flicker-prone	43 s VRAM 15G	48 s VRAM 15G	52 s VRAM 15G	1 min 2 s VRAM 15G
864 × 480 0.4MP	1 min 11 s VRAM 15G	1 min 36 s VRAM 15G	1 min 57 s VRAM 15G	2 min 59 s VRAM 15G
960 × 544 0.5MP	1 min 22 s VRAM 15G	1 min 58 s VRAM 15G	2 min 27 s VRAM 15G	3 min 58 s VRAM 15G
1152 × 640 0.7MP	1 min 46 s VRAM 15G	2 min 49 s VRAM 15G	3 min 40 s VRAM 15G	6 min 30 s VRAM 15G
1344 × 768 1.0MP · official max	2 min 27 s VRAM 15G	4 min 17 s VRAM 15G	5 min 52 s VRAM 15G	11 min 28 s VRAM 15G
1376 × 768 1.0MP · above native	2 min 31 s VRAM 15G	4 min 25 s VRAM 15G	6 min 5 s VRAM 15G	11 min 58 s VRAM 15G
1920 × 1088 2.0MP · above native	6 min 5 s VRAM 15G	13 min 21 s VRAM 15G	20 min 34 s VRAM 15G	49 min 25 s VRAM 15G

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 ~49 min 25 s 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

NVFP4 requires sm_120; SLA / VSA sparse attention can speed things up further (1.4-1.75x on long clips, see the attention options in step 2)

FAQ

Can the RTX 5080 16GB run MiniMax H3?

Yes. Estimated with 32GB RAM + fast-disk: 1920×1088·15s at ~49 min 25 s per clip. Configs that exceed VRAM fall back to weight offloading (slower, but they still render).

How fast is H3 on the RTX 5080 16GB?

About 49 min 25 s 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 5080 16GB pre-filled)

Same tier: RTX 3090 24GB · RTX 4070 Ti Super 16GB · RTX 4080 16GB · RTX 4080 32GB (modded) · RTX 4080 Super 16GB · RTX 4080 Super 32GB (modded) · RTX 4090 24GB · RTX 4090 D 24GB