Zalman ZM1000-HP 1,000W Power Supply Review
The Zalman ZM1000-HP power supply is rated for a combined, continuous output power of up to 1,000 watts at 45°C operating temperature (internal case air temperature). That’s important as some less reputable manufactures limit their power supply’s advertised capacity by specifying a lower operating temperature (25°C) in the fine print. The PSU includes universal AC line input (automatically adjusts the AC line voltage) and active PFC, which makes the unit more environmentally friendly to the local power grid. The ZM1000-HP PSU is 80PLUS certified and was designed to provide up to 86% efficiency (@230 VAC).
Zalman has elected to use six +12V rails instead of delivering a single, large +12V output as many newer power supply manufacturers are electing to do. This is accomplished by implementing current limiting circuits into the design to conform to the 240 VA maximum guidelines – no single output should exceed 240 VA (12V x 20A = 240 VA). In addition, the two +12V outputs (+12V3, and +12V4) that are dedicated to the primary PCI-E graphics connectors PCI-E1 and PCI-E2) are each rated at 28A to prevent potential power distribution problems from occurring when using multiple high-end video cards.
The following tables list the ZM1000-HP 1,000W PSU specs from the Zalman and SharkaComputer websites.