Quiet - Peaceful - Silent... Serenity. The Puget Systems Serenity Pro proves that high-performance computers can still be whisper-quiet. Intel's high-efficiency Skylake processors provide the platform for all Serenity systems, but this Pro variant offers more expansion room inside - at the cost of a larger footprint. We use the already-quiet Fractal Design Define R5 case for this, and many of the modifications we developed to silence the Serenity base model can optionally be applied here as well. The exact noise level will depend on the specific hardware selected, but the configuration options are still limited to avoid any specifically loud components.
If you want great performance combined with very quiet operation, look no further.