Review Index:

Zalman ZM750-HP 750W Power Supply Review

Manufacturer: Zalman

Introduction and Features



Zalman currently offers five different power supplies that incorporate one or more heat pipes with output capacities ranging from 500W up to 1,000W.  The ZM750-HP features a combination of fixed and modular cables, support for dual core CPUs and multiple graphic cards, and it can deliver up to 750 watts of continuous DC output.  The ZM750-HP uses heat pipe technology to augment the internal cooling system for increased reliability and to reduce noise.  While not the first PSU manufacturer to take this approach, Zalman certainly has a strong history of effectively using heat pipes in many of their CNPS (Computer Noise Prevention System) enabled products.

(Courtesy of Zalman)

Zalman has a well earned reputation in the PC industry for delivering high-quality components that are designed to reduce noise.  In addition to PC power supplies, Zalman also offers desktop and HTPC enclosures, air and water-cooling solutions, along with numerous noise fighting accessories for the PC enthusiast.

Zalman ZM750-HP PSU Key Features:

•    750 watt continuous power output

•    Heat pipe technology used to enhance cooling

•    Quiet 120mm cooling fan maximizes airflow

•    ATX12V v2.2 and EPS12V support

•    Four +12V outputs (up to 60A/720W combined)

•    Two PCI-E connectors (supports multiple graphic adapters)

•    High efficiency (up to 86%) and 80 PLUS Certified

•    Combination of Fixed and Modular cables (fully sleeved)

•    16 AWG (heavy gauge) wire used to minimize voltage drop

•    EZ grip connectors with gold plated terminals

•    Active PFC with Universal AC line input

•    3-Year warranty 

Packaging and Parts

The Zalman ZM750-HP power supply arrived securely packed inside a retail box that highlights the power supplies features and specifications.  In addition to the power supply the package includes a power cord, mounting screws, ZM-DC1 fan adapter, a printed User’s Manual, and seven modular cables.

Establishing an accurate load is critical to testing and evaluating a PC power supply.  PCPerspective’s power supply test bench can place a precise 2,000 watt DC load on the PSU under test.  Each power supply is tested under controlled, real-world conditions up to its maximum rated load (at 40ºC), using both 115 VAC and 240 VAC line voltage.  Our current suite of tests includes:

•    DC Load Regulation

•    DC Line Regulation

•    DC Cross-load (unbalanced load)

•    AC Ripple and Noise

•    Power Factor

•    Efficiency

•    Differential Temperature

•    Noise

The Zalman ZM750-HP power supply was evaluated on both features and performance.  A full range of equipment was used to test the power supply under controlled load conditions. 

•    (2) CSI3710A Programmable DC load (+3.3V and +5V outputs)

•    (4) CSI3711A Programmable DC load (+12V1, +12V2, +12V3, and +12V4)

•    FLUKE 87-III True RMS digital multimeter (Accuracy ±0.05%)

•    Extech 380803 Power Analyzer (Accuracy ±0.5% of full scale)

•    Hitachi V-650F 60 MHz dual trace oscilloscope (Accuracy ±3%)

•    Powerstat Variable Autotransformer, 1.4 KVA, 0-140 VAC

•    FLUKE  52-II digital thermometer (Accuracy ±0.3ºC/0.5ºF)

•    Extech Model 407738 digital sound level meter (Accuracy ±1.5 dB)

•    Custom Lian Li PC60 enclosure to simulate real-world operating conditions