Review Index:

SilverStone OP1000-E 1,000W Power Supply Review

Manufacturer: Silverstone

Introduction and Features



SilverStone offers a wide range of hardware for the PC enthusiast including a full line of enclosures, cooling solutions, and power supplies.  SilverStone’s OP series of power supplies is designed for mission critical applications and comes in seven sizes ranging from 650W up to 1,200W.  The new OP1000-E 1,000W power supply features a single, powerful +12V output and a quiet 120mm bottom mounted cooling fan.  All of the cables are hard-wired into the chassis and include four 6-pin PCI-E and two 6/8-pin PCI-E connectors to support multiple high-end graphics cards.

(Courtesy of SilverStone)

Here is what SilverStone has to say about the OP1000-E power supply:

“The OP series models are designed for heavy duty server and workstation use.  The OP1000-E was built to withstand enormous loading requirements of high-end industrial server PCs at above average temperature of 50°C so its ability is unmatched by ordinary power supplies.  Its voltage regulation is within ±3% for outstanding stability with a compact size (150mm) for easy integration.  If the goal is to build a future-proof multi-core CPU and GPU system, the OP1000-E is a must have with its 80A +12V single rail.”

SilverStone OP1000-E 1,000W PSU Key Features:

•    1,000W continuous power output at up to 50°C

•    Powerful single rail +12V output (80A)

•    Low ripple & noise with ±3% voltage regulation

•    Silent running 120mm fan

•    Active Power Factor Correction (.99)

•    High efficiency greater than 80%

•    Four PCI-E 6-pin and two PCI-E 6/8-pin supports multiple GPUs

•    Compact size (150mm long) for easy integration

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 (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 OP1000-E 1000W 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