Zalman ZM770-XT Power Supply Review

Conclusions

Zalman ZM770-XT is not a bad power supply, providing high efficiency between 83% and 85% if you pull up to 80% from its labeled power (i.e., up to 616 W) and terrific voltage regulation, with all voltages closer to their nominal values than required. The addition of a heatpipe and a modular cabling system that is soldered directly on the printed circuit board (instead of using wires for its connnection) were good ideas.

This power supply, however, comes with only two connectors for video cards, preventing you from installing two video cards that require two power connectors each without using adapters.

The problem with this unit is that it is very expensive for what it is. At USD 193 we simply can’t recommend it, as you can find better products costing less. You can even get a Seasonic X-Series 650 W – the best power supply we’ve ever tested – costing less. Some examples of better options include Nexus RX-8500 (USD 150, 850 W, modular cabling system, four cables for video cards), Cooler Master Silent Pro M 850 W (USD 180, 850 W, modular cabling system, six cables for video cards) and Corsair HX750W (USD 165, 750 W, modular cabling system, higher efficiency, four video card cables), just to name a few. Even the overpriced Ultra X4 850 W (USD 200, 850 W, full modular cabling system, six video card cables) is a better option than Zalman ZM770-XT.