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LTX-2.3 (22B) on 6 GB of VRAM

Not realistically: the smallest LTX-2.3 file still needs about 13 GB. The March 2026 update of LTX-2, grown to 22B parameters.

Video model · 22BAny 6 GB GPUData 2026-10-01
No
No, not realistically.

Even the smallest file (Q2_K, 8.3 GB) needs about 13.1 GB, far beyond 6 GB. It may start with heavy offloading, but this is not a realistic everyday setup. Pick a smaller model or a GPU with more memory.

Best fileQ2_K
File size8.3 GB
VRAM needed~13.1 GB
System RAM32 GB+
Memory map · 6 GB GPU13.1 GB needed · 7.1 GB over 6 GB
07 GB13 GB
Weights Q2_K · 8.3 GBWorking memory · 4.0 GBReserve · 0.8 GBSpills to system RAM · 7.1 GB
calculated How this is counted.

01Other amounts of VRAM

8 GB Offload only10 GB Offload only12 GB Offload only16 GB Tight20 GB Runs24 GB Runs32 GB Runs well

02Every file, on 6 GB

FileSizeNeededOn this cardQualityDownload
16-bit
GGUF · unsloth
42.0 GB46.8 GB40.8 GB too bigthe original weightsHugging Face →
Q8_0
GGUF · unsloth
22.8 GB27.6 GB21.6 GB too bigpractically identical to the originalHugging Face →
Q6_K
GGUF · unsloth
17.8 GB22.6 GB16.6 GB too bigvery close to the originalHugging Face →
Q5_K_M
GGUF · unsloth
16.1 GB20.9 GB14.9 GB too bigclose; small differences in fine detailHugging Face →
Q4_K_M
GGUF · unsloth
14.3 GB19.1 GB13.1 GB too biggood; some loss in fine detail and textHugging Face →
Q3_K_M
GGUF · unsloth
10.8 GB15.6 GB9.6 GB too bignoticeable loss of detailHugging Face →
Q2_K ←
GGUF · unsloth
8.3 GB13.1 GB7.1 GB too bigheavy loss; a last resortHugging Face →

“Needed” adds 4 GB of working memory for LTX-2.3 and a 0.8 GB reserve. Sizes 2026-10-01.

03What to download

PartFileFolderSize
Modelltx-2.3-22b-dev-Q2_K.gguf
Q2_K · unsloth/LTX-2.3-GGUF
models/unet8.3 GBDownload →
Text encodergemma_3_12B_it_fp8_scaled.safetensors
Gemma 3 12B FP8 (scaled) · Comfy-Org/ltx-2
models/text_encoders13.2 GBDownload →
VAEltx-2.3-22b-dev_video_vae.safetensors
LTX-2.3 video VAE · unsloth/LTX-2.3-GGUF
models/vae1.5 GBDownload →
Also neededltx-2.3-22b-dev_audio_vae.safetensors
LTX-2.3 audio VAE · unsloth/LTX-2.3-GGUF
models/vae0.4 GBDownload →
Also neededltx-2.3-22b-dev_embeddings_connectors.safetensors
LTX-2.3 text embeddings connectors (projection) · unsloth/LTX-2.3-GGUF
models/text_encoders2.3 GBDownload →
Total download · keep about the same free on disk25.6 GB

Alternatives: Gemma 3 12B FP4 mixed (9.4 GB); Gemma 3 12B BF16 (24.4 GB). FP4 files are listed only as alternatives unless the GPU is an RTX 50 (Blackwell). Only for some workflows: LTX-2.3 spatial upscaler x2 1.1 (1.0 GB, official two-stage template). Sizes from Hugging Face, 2026-10-01.

04The text encoder

At 9.4 GB even the smallest Gemma 3 12B file is too big for 6 GB, so it runs from system RAM. That slows down reading the prompt, not the picture. Sizes: 16-bit 24.4 GB, FP8 13.2 GB, FP4 mixed 9.4 GB. Why the encoder does not count against VRAM →