Vulkan (Do not use OpenGL, as it causes massive performance drops).
100% (1280x720) is default. If you have a modern GPU, safely scale this to 200% (4K) or 300% for pristine visual clarity.
Extract the downloaded RAR/ZIP archive into this folder using WinRAR or 7-Zip. Do not run the emulator from inside a zipped folder. Step 2: Download and Install PS3 System Firmware
However, because the PlayStation 3’s architecture is famously complex (utilizing the PowerPC-based Cell processor), emulating it requires a significantly powerful computer. The developers of RPCS3 have established clear system requirements to ensure a playable experience.