drbaph

/

Z-Image-Turbo-FP8

like 35

Hey, there.

Thank you for your work and the model weights.

I did some tests trying to find out which model would give the result closets to the BF16 model from Comfy-Org repo.

Setup
ComfyUI 0.10.0 running with just --low-vram toggle (latest version as of today)
32GB DDR5 + Nvidia 3050 6GB (this is why I chose fp8_e5m2)
Each image was generated without clearing the cache/memory, so the same CLIP embedding is used

Results

1. Closest to BF16 is KJ's FP8_E5M2 with weight_dtype=default (at least regarding the motorcycle)
2. Using KJ's FP8 yields different results if weight_dtype is set to default or fp8_e5m2 , while there is no change doing the same with this model
3. Using BF16 with wight_dtype=fp8_e5m2 generates an image that is very similar to the one generated by this model (FP8_E5M2)
4. Generation time was more or less the same for all combinations, around 96s per image
5. I always thought "superbike" was used for powerful motorcycles, not bicycles (without a motor) 😅

bf16 - default

bf16 - fp8_e5m2

fp8_e5m2 - default

fp8_e5m2 - fp8_e5m2

KJ's fp8_e5m2 - default

KJ's fp8_e5m2 - fp8_e5m2