Wan 2.1 T2V (14B) VRAM Calculator
Official Wan 2.1 T2V (14B) model by Alibaba. Calculate hardware limits, context VRAM usage, and local inference requirements.
Diffusion / Video ModelDeveloper: Alibaba
Recommended GPU: RTX 3090 24GB / RTX 4090 24GB
12 GB
CPU Offload (ComfyUI / LowVRAM)
Move text encoders & VAE to system RAM
Estimated Total VRAM
23.34GB
VRAM Usage Ratio100% (23.34 / 12 GB)
Memory Allocation Breakdown
DiT Backbone7.84 GB
Encoders & VAE7 GB
Latent Activation6.5 GB
CUDA Runtime2 GB
⚠️ CUDA Out of Memory Warning
+11.3 GB exceeds your GPU limit. This configuration will trigger CUDA OOM or heavy memory swapping.