Flux.2 Klein 9B — RTX 3070 best baseline
This is the current best tested Flux.2 Klein text-to-image workflow for the 8 GB RTX 3070.
Settings
- Model:
flux-2-klein-9b-fp8mixed.safetensors - Text encoder:
qwen_3_8b_fp8mixed.safetensors(flux2) - VAE:
flux2-vae.safetensors - Resolution: 1920×1080
- Sampler:
euler_cfg_pp - Steps: 6
- CFG: 1.3
- Seed:
20260920 - Measured generation time: approximately 78 seconds
The seed and prompt are intentionally fixed so future sampler, scheduler, step, CFG, LoRA, and second-pass experiments can be compared consistently.
Optional second pass
SeedVR2 3B FP8 produced a successful 2560×1440 output from this baseline. A 3840×2160 attempt ran out of the GPU's 8 GB VRAM. The SeedVR2 pass is therefore an optional export step, not part of the fast generation baseline.