Review Index:

Kingwin Lazer Platinum Series 550W Power Supply Review

Manufacturer: Kingwin
Tagged: PSU, Kingwin

Introduction and Features

The Kingwin LZP-550 PSU is one of the first 80PLUS Platinum certified power supplies to hit the market. And high efficiency isn't the LZP-550's only claim to fame. Check out our review to see why it earned an Editor's Choice award.Introduction

Kingwin has just released their first Lazer Platinum Series power supply, the LZP-550, which is one of the first 80PLUS Platinum certified PC power supplies on the market.  The LZP-550 PSU is rated for 550W output and can be easily overclocked to 650W output with only a slight drop in efficiency.  Kingwin's new power supply comes with a full compliment of fixed and modular cables, a quiet 140mm fan that doesn't even turn on until the load heats up, and includes universal AC input with Active PFC.  It is designed to support the latest Intel and AMD processors along with multiple high-end graphic adapters.  And last but not least, Kingwin has extended their traditional 3-year warranty to five years; now we're talking.

(Courtesy of Kingwin)

Kingwin LZP-550 PSU Key Features:

•    550W total continuous power; Easily Overclocked to 650W
•    80 PLUS® Platinum Certified: 90%, 92% and 89% Efficiency @ 20%, 50% and 100% Load
•    140MM Fan with Intelligent Auto Fan Speed Control
•    ECO Intelligent Thermal Control System (Patent)
•    Supports Intel Core i7-980X/Core i7/Core i5/Core 2 Quad/Core 2 Duo and
•    AMD Phenom II x6/Phenom II X4/Phenom II X3/Athlon 64 X2 CPUs
•    Compliance with ATX 12V v2.2, EPS 12V v2.91,and SSI EPS 12V v2.92 Specifications
•    Crystal Cube Modular Plugs w/ Patented Power Connector Cable Management System
•    PCI-E 6-pin and 6+2 pin connectors to support high-end graphic cards
•    Stable +12V current; 45.5A (546W)
•    Over Power/Under Power/Over Voltage/Short Circuit Protections
•    Universal AC input (115V ~ 240V) with Active PFC
•    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 Kingwin LZP-550 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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