Excerpt: The new ZM600-RS is a upgrade of the older ST model Zalman produced some time ago. The differences are mostly functional and in an improvement. The RS in the name comes from resonant switching which is a series of magnetic coils that reduces electromagnetic interference when load is applied. This also means an incease in efficiency and an upgrade to an 80Plus Bronze certification. This new power supply is just another reason why Zalman is at the top of the industry.
Summary: Zalman ZM600-RS presents high efficiency between 83.7% and 86.3% if you pull up to 80% (480 W) from it. At full load, however, efficiency drops to 80.1%. This power supply is 80 Plus Bronze certified, meaning that it should present 82% efficiency at full load, but as we have exposed on our
article, Ecos Consulting, the company behind the 80 Plus certification, uses an unrealistic room temperature to test power supplies, and efficiency drops with temperature.