Introduction and Features

The Stryker 500W Fanless power supply boasts up to 92% efficiency and is Kingwin’s first entry into the fanless PSU market.

Kingwin just released their first fanless power supply, the Stryker Fanless 500W, which is rated for 500W and can be easily overclocked to 600W output with only a slight drop in efficiency. That makes the Stryker STR-500 one of the highest output fanless power supplies on the market today. And the Kingwin Stryker 500W Fanless power supply is certified 80 Plus Platinum with up to 92% efficiency. High efficiency is always good but it is critical for a fanless power supply to help minimize waste heat. Combine that with a good combination of fixed and modular cables and a 5-year warranty and we have a very interesting new product to review!

Kingwin has impressed us recently with several of their new power supplies, most notably the LZP-550W that we reviewed earlier this year, which won an Editor’s Choice award. In addition to the new Stryker fanless PSU, Kingwin offers a complete lineup of PC power supplies ranging across seven categories along with PC chassis, external enclosures, docking stations, cooling systems, and accessories.

Continue reading the Kingwin Stryker 500W Fanless Power Supply Review!!

Fanless PC power supplies occupy a niche market and are targeted towards users who want a silent power supply, without even a whisper of fan noise. Fanless power supplies rely on convection cooling and still require airflow in and around the power supply chassis to carry away the waste heat. So while the power supply itself may not have a fan the computer enclosure must still have some means of creating airflow to keep the CPU, GPU and PSU cool. The last thing you want to do is put a fanless PSU in a closed enclosure without any fans or airflow.

Kingwin STR-500 Series PSU Key Features:

• Fanless 0 dBA Operation
• 500W continuous power output; Easily Overclocked to 600W
• Compliance with ATX 12V v2.2, EPS 12V v2.91,and SSI EPS 12V v2.92 Specifications
• 80 PLUS Platinum certified with up to 92% efficiency
• EuP: Energy consumption during shut off state less than 1W
• Support for all Intel and AMD Multi-core CPUs, ATX/BTX compliant
• Supports nVIDIA (SLI)/ATI graphic cards with up to four PCI-E connectors
• Single +12V rail design provides a maximum of 41.5A (498W)
• Fixed and modular cable system with easy plug-in design
• Universal AC input (100~250V) with Active PFC
• Over-power, over-voltage, under-power and short circuit protection
• Made with RoHS unleaded green material
• 5-Year warranty

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 Kingwin Stryker 500W Fanless 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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