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Seasonic SS-350M1U Modular 80Plus Gold Power Supply Review

Manufacturer: Seasonic

Introduction and Features

Seasonic has an excellent reputation for producing quiet ATX style PC power supplies with high efficiencies and stable outputs. However, Seasonic also has a full line of server style power supplies in both 1U and 2U form factors. In this review we will be taking a detailed look at their new SS-350M1U server style power supply, which features 80Plus Gold efficiency certification, active PFC, and modular cables. It will be interesting to see how this industrial grade unit compares to the more familiar ATX style power supplies built by Seasonic.

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Seasonic SS-350M1U Main Features:
• EPS 1U Form Factor, 350W
• ATX12V v2.31 & EPS12V compliant
• Supports the latest Intel & AMD sockets/CPUs
• 80Plus Gold efficiency certification
• DC to DC converter design
• Low ripple & noise
• Super low noise fan control
• Short circuit protection on all outputs
• Over voltage and Over power protection
• 100% hi-pot test & 100% burn in, high temperature cycled on/off

Continue reading our review of the Seasonic SS-350M1U Modular 80Plus Gold Power Supply!!

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

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The Seasonic SS-350M1U PSU 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
 

March 10, 2012 | 06:32 PM - Posted by Laurențiu Roman (not verified)

Am i wrong in thinking this looks a lot like ye old Dell xps/optiplex PSUs. I am not at all familiar with server PSUs.

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