FLUX.2 [klein] 9B on NVIDIA GeForce RTX 5090

Can the NVIDIA GeForce RTX 5090 run FLUX.2 [klein] 9B?

92 pts

Yes, it runs well

Runs well. At Q8 GGUF it needs about 20.5 GB of 32.0 GB usable, with an estimated speed of 1.7 s.

Best precision: Q8 GGUF
Memory mode: Everything on GPU
Time per image: 1.7 s
Output: 1024×1024, 4 steps

Download FLUX.2 [klein] 9B

Recommended for the NVIDIA GeForce RTX 5090: q8_gguf. Every other precision has its own download link in the table below.

Quantized files · GGUF for ComfyUI

Smaller GGUF versions for ComfyUI (with the ComfyUI-GGUF node). No sign-in needed; the model’s license still applies.

Download the q8_gguf (Q8_0) file (opens in a new tab)

huggingface.co/unsloth/FLUX.2-klein-9B-GGUF (opens in a new tab)

Original weights · Hugging Face

Full-precision files from Black Forest Labs, for fine-tuning, vLLM, Transformers, Diffusers or ComfyUI.

huggingface.co/black-forest-labs/FLUX.2-klein-9B (opens in a new tab)

Free Hugging Face account needed: accept the license on the model page and the download starts right away.

Official repo · GitHub

Reference code, inference scripts and docs from Black Forest Labs. The weights themselves download from Hugging Face.

github.com/black-forest-labs/flux2 (opens in a new tab)

git clone https://github.com/black-forest-labs/flux2

Links checked 6 days ago against Hugging Face, Ollama and GitHub.

How the S grade is scored

Every result gets up to 100 points from four parts. The points decide the letter grade.

Model qualityEditorial quality tier of the model, scaled by the quantization or precision used.	37.4 / 45
Memory fitFull marks when everything sits in GPU or unified memory; fewer when part spills to system RAM.	25.0 / 25
SpeedGeneration speed against a 40 tokens/s target for LLMs, or render time against a target for image and video.	15.0 / 15
Memory useRewards using the memory you have, so a bigger, better variant beats a tiny one that leaves most memory idle.	14.8 / 15
Total	92.2 / 100	92 ptsExcellent (S) · 92 of 100 points: Model quality 37.4/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 14.8/15

Grade scale: S 85+ · A 72+ · B 58+ · C 42+ · D 25+ · F under 25 points.

Every precision on the NVIDIA GeForce RTX 5090

Precision	Memory needed	Available	Time per output	Memory mode	Fit	Grade · points	Download
`FP16`	20.8 GB	32.0 GB	1.6 s	Text encoder offloaded	Runs well	87 ptsExcellent (S) · 87 of 100 points: Model quality 37.8/45, Memory fit 20.0/25, Speed 15.0/15, Memory use 15.0/15	Original weights (opens in a new tab)
`FP8`	19.9 GB	32.0 GB	1.4 s	Everything on GPU	Runs well	91 ptsExcellent (S) · 91 of 100 points: Model quality 37.0/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 14.3/15	Original weights (opens in a new tab)
`Q8 GGUF`	20.5 GB	32.0 GB	1.7 s	Everything on GPU	Runs well	92 ptsExcellent (S) · 92 of 100 points: Model quality 37.4/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 14.8/15	GGUF (opens in a new tab)
`Q4 GGUF`	16.2 GB	32.0 GB	1.8 s	Everything on GPU	Runs well	86 ptsExcellent (S) · 86 of 100 points: Model quality 35.2/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 11.7/15	GGUF (opens in a new tab)

Other hardware that runs it

92 ptsExcellent (S) · 92 of 100 points: Model quality 37.8/45, Memory fit 25.0/25, Speed 14.6/15, Memory use 15.0/15 Apple M4 Max (64 GB) FP16 · 11 s
92 ptsExcellent (S) · 92 of 100 points: Model quality 37.0/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 15.0/15 AMD Radeon RX 7900 XTX FP8 · 1.8 s
92 ptsExcellent (S) · 92 of 100 points: Model quality 37.0/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 15.0/15 NVIDIA GeForce RTX 3090 FP8 · 3.0 s
92 ptsExcellent (S) · 92 of 100 points: Model quality 37.0/45, Memory fit 25.0/25, Speed 15.0/15, Memory use 15.0/15 NVIDIA GeForce RTX 4090 FP8 · 1.6 s
89 ptsExcellent (S) · 89 of 100 points: Model quality 37.8/45, Memory fit 25.0/25, Speed 11.8/15, Memory use 15.0/15 Apple M1 Max (64 GB) FP16 · 16 s

Estimates come from published hardware specs and our open formulas, not from running the model on your machine. Real speed varies with runtime, drivers and settings. Numbers marked “Measured” come from a linked benchmark.