Summary: We were quite disappointed with this power supply. Although it can deliver its rated power at high temperature and high efficiency between 84% and 86% if you pull up to 360 W from it, efficiency drops below the 80% mark at full load. We also didn’t like the high noise/ripple levels when the unit was delivering its full 600 W (although they were still inside specs), the two video card connectors attached to the same cable and its price.
Summary: Zalman ZM600-HP presents efficiency around 84% when you pull between 40% and 60% from its maximum capacity (between 240 W and 360 W). Under other load patterns efficiency was between 80% and 82%.
The noise level from power supply is impressively low and when we went to the extreme of pulling 740 W from it noise level was still only at half the maximum admissible.
It is a good product if you are looking for a power supply on the 600 W range with a modular cabling system.
Excerpt: Zalman is a company typically associated with quiet computing. In the past, Zalman has offered power supplies, but they have been limited in output power. Unfortunately, until we figure out how to make a power supply 90% efficient or better, power supplies generate heat and that heat need to get exhausted or nasty things begin to happen.
Excerpt: The ZM600-HP seems to deliver the goods everywhere one looks. The heatpipe feature keeps it running cool and the LEDs keep it looking cool. This PSU has enough power to supply all but the most extreme systems with ease. Outstanding stability and efficiency are complimented by near-silent operation and a pleasing blue glow.
Conclusion: This is one of the quietest power supplys I have ever tested. I am shocked to be completely honest on how Zalman can keep making their products less noisy. I even thought the modular cables would make the rails more unstable but I was wrong and I admit it. Otherwise I don’t see any flaws with this power supply, so far our testing has not found any problems at all, even though the rails don’t stay as stable as I wish they would have stayed.
Summary: Para finalizar, podríamos decir que Zalman ha sabido lograr una fuente todo terreno, con una estética inmejorable, un rendimiento acorde a lo especificado en su caja, como así también otra de sus virtudes (como todo producto de esta empresa) es su gran silencio al operar mediante la disipación con heatpipes, y un fan de 12CM de bajas rpm.