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Seasonic Platinum Series 660W Power Supply Review

Manufacturer: Seasonic

Introduction and Features

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Seasonic has built a stellar reputation for themselves producing some of the best PC power supplies on the market. Over the years, Seasonic has been the OEM (Original Equipment Manufacturer) of choice for companies like Corsair, PC Power & Cooling, and XFX to name just a few. But Seasonic also markets power supplies under their own brand name. The Platinum 660W/760W/860W Series is Seasonic's newest flagship line for the retail market. We will be taking a detailed look at the Platinum 660W model in this review. All of the PSUs in the Platinum Series are based on Seasonic's X-Series, which has brought several major advancements to the standard PC power supply platform since its introduction over three years ago.

• Proprietary circuit design delivers High efficiency (80Plus Platinum certified)
• Full modular DC Connector Module features integrated VRMs (3.3V and 5V)
• Hybrid Silent Fan Control (3 modes of operation: Fanless, Silent and Cooling)
• High-quality Sanyo Denki SanAce120 dual ball bearing fan with PWM
• High-reliability 105°C grade A capacitors and solid polymer capacitors

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Seasonic Platinum 660W Power Supply

The Platinum 660W, 760W and 860W are top performers and highly efficient power supplies that at lower loads can operate silently in semi-fanless mode.

80Plus Platinum The Platinum Series 660W, 760W, and 860W power supplies are certified in accordance to the 80PLUS organization's highest standard, offering the newest technology and innovation for performance and energy savings with up to 92% efficiency and a true power factor of greater than 0.9 PF.

Full Modular Design (DC to DC) Carried over from the Seasonic X-Series power supplies, the new Platinum Series features an integrated DC connector panel with onboard VRM (Voltage Regulator Module) that enables not only near perfect DC-to-DC conversion with reduction of current loss/impedance and increase of efficiency but also a fully modular DC cabling that enables maximum flexibility of integration and forward compatibility.

Continue reading our review of the Seasonic Platinum Series 660 watt power supply!!

Seasonic Hybrid Silent Fan Control An industry first, advanced 3 phased (Fanless, Silent and Cooling Mode) thermal control balances between silence and cooling. In addition, a selector switch is provided to allow you to select between Seasonic S2FC control, without fanless mode or S3FC fan control with fanless mode.

Sanyo-Denki San Ace Silent Fan The world-renowned Sanyo Denki ball bearing fans are made of the highest quality components to insure maximum quality and performance. The use of spoon shaped high-density plastic fan blades with smoothed leading edges, strict tolerance ball bearings and precision copper axel are just some features to ensure ultra-low noise performance and quality."

Seasonic Platinum Series PSU Key Features:

• 80Plus Platinum certified super high efficiency up to 92%
• 7-Year warranty
• Seasonic DC Connector Panel with integrated VRMs
• DC-to-DC Converter design
• Hybrid Silent Fan Control (3 modes of operation: Fanless, Silent and Cooling)
• High-quality Sanyo Denki San Ace dual ball bearing fan with PWM
• High +12V output (single +12V rail)
• Tight voltage regulation (±2%)
• Supports high-end graphic cards
• Conductive polymer aluminum solid capacitors
• High reliability 105°C Japanese made electrolytic capacitors
• Dual sided PCB layout
• Full modular cable design
• High current Gold plated terminals with Easy Swap connectors
• Active PFC (0.99 PF typical) with Universal AC input

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 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
• AC Ripple and Noise
• Efficiency
• Differential Temperature
• Noise

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The Seasonic Platinum Series 660W 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)
• Agilent 34401A digital multimeter (Accuracy ±0.0035% vDC)
• 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)
 

January 25, 2013 | 05:51 PM - Posted by Anonymous (not verified)

F, bought the 1000watt version back in May and it came with the ugly colored modular cables.

May 1, 2013 | 11:42 PM - Posted by Anonymous (not verified)

hello there, I have a question, since you got that colored modular cables, did you report that to seasonic and did you make a request of being provided with black cables for it? just wondering because if I will be getting one, I might get colored cables too.

January 25, 2013 | 06:42 PM - Posted by Patrick (not verified)

Love me some Seasonic.

January 27, 2013 | 11:40 PM - Posted by pdjblum

Seasonic is always my first choice when I am in the market for a new psu. Not only are the psu's excellent, but so too is their customer service.

January 31, 2013 | 10:52 AM - Posted by SS (not verified)

Just got two of these and both of them had coils noise and one also coil whine. Sent them back, very disappointed. (Tested on several platforms and the noise was persistend, even on professional APC UPS)

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