Can the RTX 4050 Laptop 6 GB run Illustrious XL / Pony (SDXL anime)?
Yes, but only just: FP8 leaves 0.5 GB free on the RTX 4050 Laptop 6 GB.
FP8 (3.5 GB) fits with only 0.5 GB to spare (about 5.5 GB of 6 GB).
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | illustrious_fp8_e4m3fn.safetensors FP8 · calcuis/illustrious | models/diffusion_models | 3.5 GB | Download → |
| Total download · keep about the same free on disk | 3.5 GB | |||
The calcuis FP8 and GGUF files contain the UNet only: take the text encoders and VAE from any SDXL checkpoint, or use the 16-bit checkpoint if it fits. Sizes from Hugging Face, 2026-10-01.
02Every Illustrious / Pony file on 6 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit SAFETENSORS · OnomaAIResearch | 6.9 GB | 7.1 GB | spills 1.1 GB | the original weights | Hugging Face → |
| FP8 ← SAFETENSORS · calcuis | 3.5 GB | 5.5 GB | fits · 0.5 GB spare | practically identical to the original | Hugging Face → |
| Q8_0 GGUF · calcuis | 2.7 GB | 4.7 GB | fits · 1.3 GB spare | practically identical to the original | Hugging Face → |
| Q6_K GGUF · calcuis | 2.1 GB | 4.1 GB | fits · 1.9 GB spare | very close to the original | Hugging Face → |
| Q5_K_M GGUF · calcuis | 1.8 GB | 3.8 GB | fits · 2.2 GB spare | close; small differences in fine detail | Hugging Face → |
| Q4_K_M GGUF · calcuis | 1.5 GB | 3.5 GB | fits · 2.5 GB spare | good; some loss in fine detail and text | Hugging Face → |
| Q3_K_M GGUF · calcuis | 1.2 GB | 3.2 GB | fits · 2.8 GB spare | noticeable loss of detail | Hugging Face → |
| Q2_K GGUF · calcuis | 0.9 GB | 2.9 GB | fits · 3.1 GB spare | heavy loss; a last resort | Hugging Face → |
“Needed” adds 1.2 GB of working memory for Illustrious / Pony and a 0.8 GB reserve. Sizes 2026-10-01. The 6.94 GB checkpoint holds the UNet plus text encoders and VAE; only the UNet (about 5.1 GB) sits in VRAM while sampling. The GGUF and FP8 files from calcuis contain the UNet only.
03The text encoder
The text encoder is inside the checkpoint, so there is nothing extra to download.
04Measured and reported results
Nobody has sent measured numbers for this pair yet. If you run Illustrious / Pony on a RTX 4050 Laptop 6 GB, send your time per image and peak VRAM and it will appear here, credited.
05About the RTX 4050 Laptop 6 GB
The RTX 4050 Laptop 6 GB is an Ada Lovelace GPU with hardware FP8, so ComfyUI can compute Comfy-Org's FP8 files natively: small and fast. (Plain FP8 files use FP8 maths with the --fast fp8_matrix_mult option.) As a laptop GPU it runs at a lower power limit than desktop cards (35–115 W depending on the laptop). The memory verdicts are the same; speed depends heavily on how much power the laptop maker allows.
6 GB GDDR6 · 96-bit · Ada Lovelace · 35–115 W. Everything that runs on it →
06Questions
How much VRAM does Illustrious / Pony need?
Around 2.9 GB with the smallest file (Q2_K) and 5.5 GB with an 8-bit file (FP8). The full 16-bit file needs about 7.1 GB.
Which Illustrious / Pony file should I download for the RTX 4050 Laptop 6 GB?
FP8 (3.5 GB) from calcuis/illustrious.
FP8 or Q8_0 for Illustrious / Pony on the RTX 4050 Laptop 6 GB?
FP8 (3.5 GB): the RTX 4050 Laptop 6 GB computes it natively, while Q8_0 (2.7 GB) is unpacked on the fly.
How much do I need to download for Illustrious / Pony on the RTX 4050 Laptop 6 GB?
3.5 GB: illustrious_fp8_e4m3fn.safetensors.