Passively cooled systems rely on more energy-efficient processors that enable a good balance between performance and economy. As their waste heat is significantly lower, they can completely dispense with housing and processor fans and use heat sinks instead - which also contributes to the compactness of the systems. The passive cooling elements are designed to keep the system running reliably even under high ambient conditions and at full load. As there are no openings in the housing and no mechanical parts, the devices are particularly resistant to dust, dirt and vibrations. Another advantage is the silent operation: without a fan, the systems do not increase the noise level in already noisy production environments. Passively cooled IPCs therefore come into their own wherever low energy consumption, low waste heat and compactness are more important than maximum performance.