LTX-Video VRAM requirements

Short answer: the LTX-Video 13B (v0.9.8) checkpoint is 28.58 GB, or 15.69 GB in FP8; the 2B distilled checkpoint is 6.34 GB, or 4.46 GB in FP8.^[1] Lightricks publishes no official VRAM figure, so we list weights only. The T5 text encoder adds 19.05 GB of files.^[1]

LTX-Video is Lightricks' DiT-based video generation model. Its default output is 1216 × 704 at 30 FPS, and it works best under 720 × 1280 and under 257 frames.^[2] It had about 1.15 million Hugging Face downloads in the last 30 days.^[1]

Weights only: file sizes on Hugging Face

From the Lightricks/LTX-Video file listing (1 GB = 1,000,000,000 bytes; checked November 4, 2026).^[1]

Memory while generating

Video activation memory grows with resolution and frame count, and Lightricks doesn't publish a measured figure. The official README only says the 13B dev model "requires more VRAM", the 13B distilled model uses less, and the 2B distilled model is "ideal for light VRAM usage".^[2] The README also lists a community 8-bit build (LTX-VideoQ8, not by Lightricks) that reports 720×480×121 videos in under a minute on an 8 GB RTX 4060.^[2] We haven't measured it ourselves.

What this means for your GPU

• 8–12 GB: start with the 2B distilled FP8 checkpoint (4.46 GB). See what you can run on 12 GB.
• 16–24 GB: the 13B FP8 checkpoint (15.69 GB) needs a 16 GB+ card just for its weights. See the RTX 4090 page.
• 13B at full precision (28.58 GB): 32 GB+ cards like the RTX 5090, or the cheapest GPU rental per hour.
• Other video model: Wan 2.2 VRAM.

Frequently asked questions

How much VRAM does LTX-Video need?

Lightricks doesn't publish a figure. The 13B weights are 28.58 GB (15.69 GB FP8) and the 2B distilled weights are 6.34 GB (4.46 GB FP8), before activation memory.

Can LTX-Video run on 8 GB?

The README lists a community 8-bit build reporting 720×480 videos on an 8 GB RTX 4060. Use the 2B model.

Every number on this page links to its source.