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Enermax MODU87+ 900W Power Supply Review

Manufacturer: Enermax
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Introduction and Features

Introduction

                   

Enermax has a well earned reputation for delivering reliable power supplies, enclosures, and other accessories to the PC enthusiast market.  Enermax recently added two more PSUs to the upper end of their MODU87+ series, which now includes five power supplies ranging from 500W to 900W.  One of the unique features built into the MODU87+ line is what Enermax refers to as Dynamic Hybrid Transformer Topology (DHT).  The focus of DHT is to dynamically change the operating voltage and frequency in the AC side of the PSU to help maximize overall efficiency.  And as you will see later on in this review, the MODU87+ 900W PSU proved to be very efficient and quiet.

Enermax MODU87+ 900W Power Supply

The new MODU87+ series power supplies from Enermax are designed to deliver stable outputs with high efficiency and minimal noise.  Both MODU87+ and Pro87+ power supplies are 80Plus Gold certified to be at least 87% efficient from 20% thru 100% of the rated output power with 90% efficiency or better at 50% load. 

Enermax MODU87+ 900W PSU Key Features:

•    900 watt continuous power output

•    24/7 Industrial class performance at 50°C ambient

•    High efficiency operation 87-92% (80Plus Gold certified)

•    Dynamic Hybrid Transformer Topology

•    Supports high-end graphic cards with six 6/8-pin PCI-E connectors

•    DXXI Ready (supports new generation >300W DXXI graphic cards)

•    139mm fan features Twister bearings for long life

•    Four +12V rails with up to 75A (900W)

•    High-quality Japanese capacitors for maximum durability and stability

•    SafeGuard: Protection circuits for OCP, OVP, UVP, OPP, OTP, SCP and SIP

•    HeatGuard: keeps fan running for 30~60 seconds after shutdown

•    CordGuard: AC cord fixed to avoid accidental shutdowns

•    Future Ready: 12-pin modular design

•    5-Year warranty

PSU Testing Methodology

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, 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 Enermax MODU87+ 900W 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)

•    (2) 200W Precision resistor load bank (+12V5 and +12V6)

•    Switchable precision resistor load bank (-12V and +5VSB)

•    Extech MultiMaster MM570 digital multimeter (Accuracy ±0.02%)

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

•    DS1M12 "StingRay" digital oscilloscope (20M S/s with 12 Bit ADC)

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

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

•    Custom PC60 enclosure to simulate real-world operating conditions


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