Platinum 660

The most popular member of the Seasonic Platinum product line is well known for its stability and reliable performance. This unit achieves extremely high power conversion efficiency with unbelievably tight (2%) voltage regulation. Like all Platinum series units, the Platinum 660 also comes outfitted with fully modular cables that offer flexibility during system build. The Seasonic patented Hybrid Silent Fan Control can be personalized with the help of a toggle switch, which allows users to select between the S2FC control (without Fanless Mode) and the S3FC fan control (including Fanless Mode). This power supply is a true definition of what genuine premium power supplies should be.

SKU: SS-660XP2 Active PFC Categories: ,

80 PLUS®Platinum

The higher the level of efficiency of the power supply, the less power gets wasted in the form of excess heat . The 80 PLUS® Platinum certification guarantees greater than 90 %, 92 % and 89 % efficiency at 20 %, 50 % and 100 % operating loads, respectively. The Seasonic Platinum Series represents the highest level of technology and efficiency achievement of Sea Sonic during its 40 years of commitment to engineering excellence.

Fan Type Sanyo Denki-01

Sanyo Denki Fan

The world-renowned Sanyo Denki ball bearing fans are made of the highest quality components to ensure ultra-low noise performance. The fan’s perfect balance and even rotations are achieved via the use of spoon-shaped, high-density plastic fan blades that are finished off with smoothed leading edges. Sanyo Denki fans are known for their strict tolerance ball bearings and precision copper axels. Instead of the industry standard of two balancing points they use three points to strengthen the mount and further stabilize the blade.

Fan Control S3FC-01

Hybrid Silent fan Control

The industry’s first, Seasonic patented, advanced three-phased thermal control achieves optimal between silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode.


Benefits of this design

  • Reduced noise without increase in temperature;
  • Extended fan life due to the reduced number of fan rotations;
  • Optimized heat dissipation at all times;
  • Unsurpassed silent performance in Fanless Mode.

Additionally, there is a switch at the back of the power supply which allows users to customize their cooling needs by selecting between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode).

Double Ball Bearing Fan-01 

Double Ball Bearing Fan

These durable power supply fans play an important part in the temperature control of the entire system by not only keeping themselves cool but also by removing warm air from inside the computer case. Coupled with Sea Sonic’s fan control circuit, double ball bearing fans are great performers, relatively quiet and have a very long life span.

DC to DC Converter Design-01

DC to DC Converter Design

The step down DC to DC converter design allows the power supply to be able to serve system components with various voltage needs. Not only is it a flexible, clean voltage conversion solution but it also maximizes the 12 V DC rail output, delivers superior dynamic response and , ultimately, provides for greater system stability.

Stable Voltage Regulation-01 

Stable Voltage Regulation (2 %)

Improved voltage regulation stays well within Intel’s specifications to ensure smooth operation and protect all system components.

Specifications are subject to change without prior notice.
Note: Since the beginning of 2015, Seasonic has implemented changes in its retail box design and modular cables are now packed in a black cardboard box.

Platinum 660
AC InputVoltage: 100 V - 240 V
Current: 8.5 - 4 A
Frequency: 50 Hz - 60 Hz
DC OutputRail+3.3 V+5 V+12 V-12 V+5 VSB
Maximum Power25 A25 A55 A0.5 A3 A
125 W660 W6 W15 W
Total continuous power660 W
Platinum 660 Technical Specifications
Form FactorIntel ATX 12 V
Dimensions150 mm (W) x 160 mm (L) x 86 mm (H)
Fan InformationFan Size120 mm
Fan ControlSeasonic S3FC
Fan BearingDouble Ball Bearing
Life Expectancy70,000 at 40 °C, 15 % - 65 % R.H.
Cable InformationModularityFully Modular
Cable typeFlat black cables
Electrical FeaturesOperating Temperature40 °C
MTBF @ 25 °C, excl. fan150,000 hours
AC InputFull Range
ProtectionOPP, OVP, UVP, OCP, OTP, SCP
Safety and EnvironmentalSafety and EMCcTUVus, TUV, Gost-R, CB , BSMI, CCC, CE, FCC, C-tick
Environmental ComplianceEnergy Star, RoHS, WEEE, ErP Lot 6, REACH
Warranty7 Years
Packaging information
Units per carton4
Individual carton size330 (L) x 130 (W) x 195 (H) mm
Shipping carton size545 (L) x 215 (W) x 360 (H) mm
Specifications are subject to change without prior notice.

ConnectorConnector CountLengths
MAIN-POWER-24-20-PIN-A1610 mm - modular
650 mm - 8/4 pins modular
650 mm - 8 pins modular
PCIE-6-8-PIN-1-A4600 mm - modular
SATA-5-PIN-A10400 mm + 120 mm + 120 mm + 120 mm - modular
300 mm + 120 mm - modular
PERIPHERAL-4-PIN-A5400 mm + 120 mm + 120 mm - modular
300 mm + 120 mm - modular
FDD-4-PIN-1-A1100 mm - modular
Specifications are subject to change without prior notice.





eTeknix.com | Extreme Performance

July 29, 2014

Seasonic’s Platinum 660 demonstrates exactly why Seasonic are industry-leaders in the power supply market. This power supply has it all and if you’re serious about getting high efficiency and good quality power then look no further than the Seasonic Platinum 660. With a 7 year warranty this is not just a power supply but a long term investment that you’re unlikely to need to upgrade for a very long time.”

(Read More)

Hardware Info | Gold Award

December 12, 2013

“…perfect product…”

(Read More)

Technews.lt | Recommended

August 22, 2013

Nekyla abejonių, jog „Seasonic Platinum“ serijos P660XP2 maitinimo blokas vertas vietos tarp elitinių maitinimo šaltinių.

There is no doubt that “Seasonic Platinum Series P660XP2 power supply has worthy place among the elite power sources.

(Read More)

Technic3D | Gold Award

May 17, 2013

“State of the Art”

(Read More)

Technic3D | ECO Award

May 17, 2013

“Das Seasonic Platinum 660 Watt Netzteil überzeugt auf ganzer Linie. Dank moderner Technologien erfüllt das Netzteil die 80 PLUS Platin Zertifizierung und garantiert damit eine hohe Effizienz im Betrieb.”

(Read More)

Easycom | High Functionality

March 14, 2013

“использование синхронного выпрямителя с DC-DC преобразователями и качественной элементной базы позволило добиться впечатляющих результатов”

(Read More)

PC-eXPerience | PC-Experience Technology Award in Gold

February 26, 2013

“Extreme Stabilität, sehr hohe Leistungsreserven”

Extreme stability, very high power reserves

(Read More)

HardOCP | Editor’s choice

February 4, 2013

“…probably the best power supply we have reviewed overall. The PLATINUM-660 posts the best voltage regulation we have ever seen, close to the best efficiency we have ever seen, it is for all intents and purposes is silent compared to other components in a system, has outstanding DC Output Quality, absolutely excellent build quality, and even posts better Transient Load responses than we have seen in a long time from a unit of such a capacity. Perhaps the only way the Platinum-660 gets better is if Seasonic was giving these away! ”

(Read More)

PC Perspective | Editor’s choice

January 25, 2013

“…one very good power supply!”

(Read More)

Platinum 660
Platinum 660
Platinum 660
Platinum 660