If Lychee Slicer is running slowly, crashing during slicing, or not working as expected despite meeting the requirements, work through the steps below.


1. Check your system meets the requirements Visit https://mango3d.io/requirements/ to verify your setup. Keep in mind that the listed requirements are based on 2K/4K printers — higher resolution printers (6K, 8K, 12K) require more GPU power. Other factors that affect performance:

  • High polygon count models
  • Large file sizes
  • Anti-Aliasing settings (higher AA = more GPU needed — not all projects require it)
  • Age of your components

2. Force High GPU Mode Tell Lychee Slicer to use your dedicated graphics card in priority. Available on Windows, Mac, and Linux — instructions here: https://doc.mango3d.io/doc/technical-documentation/technical-issues/force-high-gpu-mode-performance/

3. Reinitialize Lychee Slicer This can resolve performance and stability issues — instructions here: https://doc.mango3d.io/doc/technical-documentation/technical-issues/reinitializing-lychee-slicer/

4. Check your 3D file If Lychee Slicer crashes specifically at slicing:

  • Check if your model appears red in the viewport — this means it needs repairing. Use the built-in Repair Tool or a 3D design program before slicing
  • If your model has a very high polygon count, try with a lighter file to rule out the file as the cause

If the issue persists, contact support at https://mango3d.io/contact-us/ with the following: