ZM500-HP is an ultra-quiet power supply that complies with ATX12V Version 2.2, and supports the latest dual-core CPUs(Intel Core2 series/AMD Athlon64-X2 series), as well as the latest dual graphic card systems(NVIDIA® SLI®-Ready Certified).       Heatpipes Installed for Maximum Cooling Performance and Ultra-Quiet Operation A heatpipe with ultra-high cooling performance incorporated on the power supply’s main rectifiers enables high load operation even at low RPM for a dramatic reduction in noise levels.   Improved Power Factor & Reduced Harmonics through Active PFC By implementing Active PFC(Power Factor Correction), the Power Factor (PF) is improved from 75% (Passive PFC) up to 99% while harmful harmonic frequencies are reduced to meet the line harmonic distortion requirements of IEC61000-3-2 Class D.   High Efficiency Design This power supply is capable of reaching a maximum of 81% efficiency(230VAC, Full & Typical Load) through its use of high switching frequency and low power-loss circuitry.   ATX20+4 Pin Main Connector ATX20+4 pin main connector broadens the range of motherboard compatibility.   Supports ATX12V CPU 4-Pin and EPS12V CPU 8-Pin Two ATX12V CPU 2ⅹ2(4-Pin) power cables can be combined to form an EPS12V CPU 8-Pin power cable.   Dual PCI Express VGA Power 6-Pin Connector Support Nvidia SLi dual graphic card systems.   Module Cables Modular cables provide organized cable management and improved air circulation inside the computer case.   Ultra Quiet 120mm Fan Ultra quiet 2-Ball Bearing 120mm fan maximizes the airflow and minimizes the noise level enabling a noiseless computing environment with optimized cooling.   Two Independent +12VDC Outputs Two +12VDC rails supply power independently to the CPU, VGA, motherboard, and peripheral components for the highest level of stability and performance.   EZ Grip Connectors for ODDs & HDDs EZ Grip Connectors for easy removal of the plugs from ODDs & HDDs.   Gold-Plated Terminals Gold-plated the terminals minimize power loss by reducing contact resistance.   Sleeved Cables All power cables are sleeved for easy cable management and improved air circulation inside the computer case.   Multiple Safety Features Over-Voltage Protection, Over-Current Protection, Short-Circuit Protection, Under-Voltage Protection, Over-Temperature Protection.   Internal Blue LED Blue LEDs are installed inside the power supply for cool aesthetics.   WEEE & RoHS Complies with WEEE & RoHS environmental directives of the European Union. - WEEE (Waste Electrical and Electronic Equipment) - RoHS (Restriction of Hazardous Substances)   International Safety and EMC Certifications

Output Power Cable Specifications   [Cable Types and Functions]         [Dual-Connector (ZM-DC1) Components]       Electrical & Physical Characteristics   AC Input Range Voltage 100VAC ~ 240VAC ±10% DC Output Frequency 47Hz~63Hz Output V. Output Load Rating Combined Power AC Input Current (Rated) 115VAC 10A Imin Imax Ipeak 230VAC 5A +3.3V 0.8A 24A   140W 500W PFC Type Active PFC +5V 0.5A 24A   Power Factor 99% Maximum   +12V1 1.0A 25A   432W Inrush Current Limit (@ Cold start at 25°C) 115VAC 60A +12V2 1.0A 18A   230VAC 100A -12V 0.0A 0.5A   18.5W Efficiency 81% Maximum @230VAC, Full & Typical load   +5VSB 0.1A 2.5A 3.5A DC Output Voltage Regulations Output V. Regulation Range At Full Load Protection Features +3.3V ±5% +3.14V~+3.47V Over Voltage Protection(OVP) +5V ±5% +4.75V~+5.25V Over Current Protection(OCP) +12V1 ±5% +11.4V~+12.6V Short Circuit Protection(SCP) +12V2 ±5% +11.4V~+12.6V Over Temperature Protection(OTP) -12V ±10% -10.8V~-13.0V Under Voltage Protection(UVP) +5VSB ±5% +4.75V~+5.25V Ambient Temperature DC Output Ripple & Noise Output V. Specification At Full Load Operation 0°C ~ +50°C +3.3V 100mV Storage -20°C ~ +80°C +5V 100mV Ambient Humidily +12V1 200mV Operation 5%RH ~ 95%RH +12V2 200mV Storage 5%RH ~ 95%RH -12V 200mV Dimensions +5VSB 100mV 150(L) x 165(W) x 86(H) mm

Zalman affixes a Computer Noise Prevention System (CNPS) mark to all components used for noiseless computers.

Plugging the main power connector P1 into the motherboard while the product is connected to the AC power source may result in damage to the motherboard. Make sure that the connectors are connected to their designated locations, and that the connectors are not oriented in the wrong direction when connecting the DC output connectors. If the Power On light fails to light up when the main power button is pressed after completing the installation procedure, then some devices may be plugged in incorrectly or the motherboard may be faulty.