Can the RTX 4090 Laptop 16 GB run Mage-Flow (Microsoft)?
Yes. 16-bit fits on the RTX 4090 Laptop 16 GB with 6.0 GB to spare.
Take 16-bit (8.2 GB). In use it comes to about 10.0 GB, with 6.0 GB left over on 16 GB.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | mage_flow_bf16.safetensors 16-bit · Comfy-Org/Mage-Flow | models/diffusion_models | 8.2 GB | Download → |
| Text encoder | qwen3vl_4b_bf16.safetensors Qwen3-VL 4B BF16 · Comfy-Org/Mage-Flow | models/text_encoders | 8.9 GB | Download → |
| VAE | mage_flow_vae_bf16.safetensors Mage-Flow VAE · Comfy-Org/Mage-Flow | models/vae | 0.3 GB | Download → |
| Total download · keep about the same free on disk | 17.5 GB | |||
Sizes from Hugging Face, 2026-10-01.
02Every Mage-Flow file on 16 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit ← SAFETENSORS · Comfy-Org | 8.2 GB | 10.0 GB | fits · 6.0 GB spare | the original weights | Hugging Face → |
| INT8 SAFETENSORS · Comfy-Org | 4.2 GB | 6.0 GB | fits · 10.0 GB spare | practically identical to the original | Hugging Face → |
“Needed” adds 1 GB of working memory for Mage-Flow and a 0.8 GB reserve. Sizes 2026-10-01.
03Measured and reported results
Nobody has sent measured numbers for this pair yet. If you run Mage-Flow on a RTX 4090 Laptop 16 GB, send your time per image and peak VRAM and it will appear here, credited.
04About the RTX 4090 Laptop 16 GB
The RTX 4090 Laptop 16 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 (80–150 W depending on the laptop). The memory verdicts are the same; speed depends heavily on how much power the laptop maker allows.
16 GB GDDR6 · 256-bit · Ada Lovelace · 80–150 W. Everything that runs on it →
05Questions
How much VRAM does Mage-Flow need?
Around 6.0 GB with the smallest file (INT8) and 6.0 GB with an 8-bit file (INT8). The full 16-bit file needs about 10.0 GB.
Which Mage-Flow file should I download for the RTX 4090 Laptop 16 GB?
16-bit (8.2 GB) from Comfy-Org/Mage-Flow.
How much do I need to download for Mage-Flow on the RTX 4090 Laptop 16 GB?
17.5 GB: mage_flow_bf16.safetensors, qwen3vl_4b_bf16.safetensors, mage_flow_vae_bf16.safetensors.