§01·compatibility · /check
Flux.2-Klein-4B on RTX 4090
Yes — Flux.2-Klein-4B runs on the RTX 4090 (24 GB).
✓ runsimageactive40 series24GB VRAM
step-by-step recipe for this pair
Flux.2 Klein 4B on RTX 4090: BF16 Full-Resident 4-Step Text-to-Image via Diffusers or ComfyUI
imagebeginner20GB+
model
- name
- Flux.2-Klein-4B
- slug
- flux-2-klein-4b
- vertical
- image
- status
- active
- repo
- huggingface.co ↗
§02·benchmarks
| Task | Quant | Speed | VRAM | Works | Confidence | Source | Verified |
|---|---|---|---|---|---|---|---|
| t2i | bf16 | 20GB | ✓ | reddit.com· reddit | 2026-05-13 |
§03·more Flux.2-Klein-4B recipes
- imageintermediate13GB+
Flux.2 Klein 4B on RX 7800 XT: ComfyUI on ROCm, BF16 4-Step Text-to-Image (16 GB)
- imageintermediate13GB+
Flux.2 Klein 4B on RX 7900 XTX: ComfyUI on ROCm, Full BF16 4-Step Text-to-Image
- imagebeginner8GB+
Flux.2 Klein 4B on RTX 3080 Ti: FP8 ComfyUI 4-Step Text-to-Image at ~8.4 GB
- imagebeginner8GB+
Flux.2 Klein 4B on RTX 3060: FP8 ComfyUI 4-Step Text-to-Image at ~8.4 GB
§04·common questions
Can you run Flux.2-Klein-4B on RTX 4090?
Yes — Flux.2-Klein-4B runs on the RTX 4090 (24 GB).
Which quantizations have been tested for Flux.2-Klein-4B on RTX 4090?
bf16 — measured in community benchmarks.
Are there step-by-step instructions for Flux.2-Klein-4B on RTX 4090?
Yes — a step-by-step recipe documents Flux.2-Klein-4B on the RTX 4090, linked at the top of this page.