diff --git a/troubleshooting/overview.mdx b/troubleshooting/overview.mdx index 62b3e7952..1ece902b1 100644 --- a/troubleshooting/overview.mdx +++ b/troubleshooting/overview.mdx @@ -464,6 +464,29 @@ When reporting any issue, include: +## Common Questions + +### What resolution or dimensions should I use for my GPU? + +There is no single "best" resolution for a given GPU model. The maximum viable resolution depends on your specific model type, VRAM, and the workflow complexity. As a general guideline: + +- **8 GB VRAM (e.g. RTX 3070, RTX 4060):** 512x512 to 1024x1024 for SD1.5/FLUX; smaller sizes for video models +- **12-16 GB VRAM (e.g. RTX 4070, RTX 3080, RTX 4080):** 768x768 to 1280x1280 for images; 512x512 video at shorter lengths +- **24 GB VRAM (e.g. RTX 4090, RTX 3090, A5000):** 1024x1024 to 1536x1536 for images; up to 640x640 video or longer clips +- **48 GB+ VRAM (e.g. A6000, A100):** Highest available resolutions, multi-workflow batching + +Start with the default dimensions of the model you are using and increase gradually. If you run out of memory, reduce the resolution, switch to a fp8 quantized model, or lower your batch size. + +### How does the noise seed work? + +The **noise seed** controls the random noise pattern that the sampler starts from. Using the same seed, model, checkpoint, and parameters will produce the exact same result every time. This is useful for: + +- **Reproducing a specific output:** share the seed along with your workflow +- **Comparing parameter changes:** keep the seed fixed and change only one setting to isolate its effect +- **Batch variation:** change the seed to explore different outputs + +The seed is set in nodes like [RandomNoise](/built-in-nodes/RandomNoise) or in the `seed` input of [KSampler](/built-in-nodes/KSampler), or `noise_seed` in [KSamplerAdvanced](/built-in-nodes/KSamplerAdvanced) and [SamplerCustom](/built-in-nodes/SamplerCustom). + ## Community Resources - **Official Forum:** [forum.comfy.org](https://forum.comfy.org/)