ComfyUI SeedVR2 upscaler v1.5.7 tames DiT VRAM spikes, runs TensorRT under 6GB
simmol · reddit · 2026-10-01
ComfyUI-SeedVR2-VideoUpscaler-with-TensorRT v1.5.7 fixes momentary VRAM spikes during the DiT stage that plagued low-VRAM GPUs.
- The author found the spikes weren't caused by TensorRT itself but the DiT processing stage, despite existing ConvRot INT8/NVFP4 support
- RTX 4050 6GB and RTX 5060 8GB users were hit hardest
- Under specific conditions with the 3B NVFP4 model, the entire TensorRT pipeline now stays under 6GB VRAM
- Release and full technical guide are on GitHub
Related event: SeedVR2 Upscaler Plugin Update Cuts TensorRT VRAM Needs Below 6GB(2 posts)→
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