# System Requirements

Simulations with openPASS are designed to be very lightweight and performant, without imposing huge requirements on the underlying hardware. Thus, openPASS simulations run as a single core application and do not utilize GPU. Only the build process during installation of openPASS makes use of multiple cores, so it is recommended to have at least a 4 core CPU. In the table below, minimal requirements are listed along with a commonly used, well working example setup.

System Specification | Minimal Requirements | Tested Setup (exemplarily)
--- | --- | ---
Operating System | Windows or Linux (Debian Bookworm or Ubuntu 22.04 recommended) | Windows 10
CPU | Intel x64 Architecture with at least 1,50 GHz clock frequency | Intel i5-10310U
RAM | at least 8 GB | 8 GB
GPU | not used by the simulation | Intel UHD Graphics 620
Others | 1 GB free hard disk space |