Z-Image Turbo 3070 Fast Start

Summary

Best current text-to-image starter for a lighter local box.

This master stays close to the official Z-Image Turbo example because that is still the cleanest and most portable Z-Image graph in the repo.

Status

best-current
not-yet-tested-on-chris-box

Workflow asset

workflow.json
workflow.png
Prefer workflow.json for current testing and editing.
workflow.png is the original embedded example import.

Direct test command

You can also submit it straight to the live ComfyUI server with:

node scripts/submit-workflow-test.mjs --workflow optimized/text-to-image/zimage-turbo-3070-fast-start/workflow.png --prompt "<your prompt>"

That path reads either the JSON workflow or the embedded PNG prompt chunk, applies text-to-image overrides, submits the job, polls history, and downloads the outputs locally.

Built from

models/zimage/z-image-turbo-official-example/

Why this is the current master

Official source beats community guesswork for a first baseline.
Z-Image Turbo looks like one of the strongest fast-image candidates for a 3070.
The graph is simple enough to troubleshoot without drowning in custom-node noise.

What I intentionally kept

Official model wiring
Official qwen_3_4b text encoder path
The original embedded PNG workflow as a reference import

What I intentionally changed

switched the maintained test target to workflow.json
repointed the loader names to the live server filenames
lowered the default latent size to 768x768
lowered the default sampler steps to 6

What I intentionally did not add yet

community patch nodes
extra control branches
reference-image complexity
"magic" speed hacks without proof

Required models

models/text_encoders/Qwen/qwen_3_4b.safetensors
models/diffusion_models/zImageTurbo_turbo.safetensors
models/vae/ae.safetensors

Required custom nodes

none beyond current official Comfy support

Monday test checklist

Confirm it imports cleanly from PNG on your current Comfy build.
Check whether it really feels lighter than your usual FLUX path.
Check whether prompt adherence is good enough to justify keeping it as the fast-start master.

Next optimization candidates

merge in useful edit/reference ideas from the community Z-Image graphs
build a stronger prompt preset if the base graph is good but inconsistent