video model · ltx-video · Windows
LX Can I run LTX-Video 13B on Nvidia GeForce RTX 4080 (16GB)?
Needs ~20 GB at fp8, but only ~15 GB is usable on Nvidia GeForce RTX 4080 (16GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.
Needs ~20 GB at fp8, but only ~15 GB is usable on Nvidia GeForce RTX 4080 (16GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.
- Peak VRAM
- ~20 GB
- Usable on device
- ~15 GB
- Device memory
- 16 GB
- Quant
- fp8
- Type
- video (DIT)
- Parameters
- 13B
- Peak VRAM
- ~20 GB at fp8
- Resolution
- 1216×704
- License
- LTX-Video Open Weights (OpenRAIL-M)
- Memory
- 16 GB vram
- Usable for weights
- ~15 GB
- Best runtime
- vLLM (Linux) / Ollama (CUDA)
What you can run instead
Run LTX-Video 13B on other hardware
FAQ
Can Nvidia GeForce RTX 4080 (16GB) run LTX-Video 13B?
Needs ~20 GB at fp8, but only ~15 GB is usable on Nvidia GeForce RTX 4080 (16GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.
How much VRAM does LTX-Video 13B need?
Nvidia GeForce RTX 4080 (16GB) does not have enough memory. At fp8 the realistic peak is ~20 GB of VRAM, versus ~38 GB with every component kept resident (no offload). With aggressive CPU offload it drops to ~12 GB, much slower.
What do I use to run LTX-Video 13B locally?
LTX-Video 13B runs in ComfyUI or Diffusers. It loads as a video diffusion checkpoint plus its text encoder and VAE, not a single chat command.
Sources
VRAM figures are sourced peak-usage anchors at the noted quant, validated 2026-06-15. See methodology.