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SilverStone Strider Plus 850W Power Supply Review

Manufacturer: Silverstone
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Introduction and Features

Introduction


SilverStone has a well earned reputation among PC enthusiasts for providing a full line of high quality enclosures, power supplies, cooling components, and accessories.  Their new Strider Plus series, which includes models ranging from 500W up to 1,000W, was designed to offer an unparalleled combination of power, efficiency and flexibility.  The Strider Plus ST85F-P that we have up for review today is rated for 850W DC output and is 80 Plus Silver certified.  It comes with a full compliment of all modular cables, including dual EPS connectors and four PCI-E connectors for multiple high-end graphics adapter support.  High efficiency also means less waste heat, which should result in lower operating temperatures and less fan noise.


Here is what SilverStone has to say about their new Strider Plus 850W power supply:

The Strider series, as the oldest and most versatile power supply line from SilverStone, has models with myriad of innovative features and rating from 350W all the way up to 1500W. To build on this impressive lineup, SilverStone engineered a new generation of power supplies that combine more important features than ever before. The Strider Plus models, ST75F-P, ST85F-P and ST1000-P are highly efficient (80 PLUS Silver level), compact enough to fit in nearly any system (160mm depth), and have tightly regulated performance of ±3% from a single +12V rail design, and equipped with a quiet but cool 135mm fan. To top these features off, the power supplies also come with 100% modular cables with all the important connectors to support current and future graphics card specifications. For enthusiasts that are looking for a power supply with all the right features to make a high performing and aesthetically pleasing system, any one of the Strider Plus models will fulfill the task with maximum satisfaction.”

SilverStone ST85F-P PSU Key Features:

•    850W 24-Hour continuous power (40°C)

•    950W Peak power

•    100% Modular cables

•    Efficiency 85%~88% at 20%~100% loading

•    Class-leading single +12V rail with 67A (peak 72A)

•    Strict ±3% voltage regulation and low ripple and noise

•    Japanese made main capacitors

•    Silent running 135mm fan with 19dBA minimum

•    Dual EPS 8-pin connectors

•    Four PCI-E connectors (8-pin and 6-pin)

•    Capacitors attached to PCI-E cables to reduce electrical noise

•    Supports ATX12V 2.3 and EPS12V

•    Active Power Factor Correction

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 (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 SilverStone Strider Plus 850W 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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