This Seasonic Third Generation X-series model does not simply provide above 1 kW total power output but is also offers a very stylish appearance and performance coupled with Green PC Technology. Featuring a patented design of DC Connector Module with Integrated VRM and a fully modularized design, the X‑1050 is set to achieve near-perfect DC-to-DC conversion without compromising efficiency. Its 80 PLUS® Gold certification guarantees that efficiency will stay above 87% with a true power factor of greater than 0.9. Being Energy Star 5.0 compliant, this unit operates at reduced energy consumption under standby, sleep and idle modes.

SKU: SS-1050XM2 Active PFC Categories: ,

80 PLUS®Gold

Seasonic was the forerunner of creating the very first 80 PLUS® Gold certified power supply on the market and since that time it has built a very popular Gold series lineup that covers a full power range of power supplies with impeccable performance and efficiency. The highly efficient 80 PLUS® Gold certification guarantees greater than 87 %, 90 % and 87 % efficiency at 20 %, 50 % and 100 % operating loads, respectively. The clear advantage of buying a power supply with 80 PLUS® Gold rating is the fact that the less energy gets wasted during power conversion, the lower the operating costs will be for the user.

Dual Copper Bars-01  

Dual Copper Bars

Due to their increased diameter, pure copper bars carry high current much more effectively than the traditional copper strips. If the goal is to achieve high quality power conversion with stable power output and minimized loss, it is very important that power conduction in the high wattage area remains extremely efficient, because it also reduces impedance and minimizes voltage drop as the load increases.

7 Years Warranty-01

7 Years Warranty

Our commitment to superior Seasonic quality.

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.

The New Seasonic S3FC Fan control

XP3 XM2 fan chart

What is S3FC?

The industry’s first, Seasonic patented, advanced three-phased thermal control balances between silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode. In addition, there is a switch provided to allow for manual selection between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode).

New! Power saving by hysteresis

Hysteresis is achieved by an additional fan control IC, which optimizes how frequently the fan switches on and off. At 25 °C ambient temperature the fan turns on when the load rises above 35 % (±5 %) and it turns off when the load drops below 25 % (±5 %). Due to this lag in response the fan switches on and off less frequently, which reduces noise and power loss in Fanless Mode and Silent Mode.

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.

AC InputVoltage: 100 V - 240 V
Current: 15 - 7.5 A
Frequency: 50 Hz - 60 Hz
DC OutputRail+3.3 V+5 V+12 V-12 V+5 VSB
Maximum Power25 A25 A104 A0.5 A3 A
150 W1044 W6 W15 W
Total continuous power1050 W
X-1050 Technical Specifications
Form FactorIntel ATX 12 V V 2.31
Dimensions150 mm (W) x 190 mm (L) x 86 mm (H)
Fan InformationFan Size120 mm
Fan ControlNew Seasonic 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, 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 size385 (L) x 130 (W) x 195 (H) mm
Shipping carton size545 (L) x 215 (W) x 405 (H) mm
Specifications are subject to change without prior notice.

ConnectorConnector CountLengths
MAIN-POWER-24-20-PIN-A1610 mm - modular
PCIE-8-PIN-A24/8 Pin - 650 mm- modular
8 Pin - 650 mm- modular
PCIE-6-8-PIN-1-A8550 + 100 mm - modular
550 + 100 mm - modular
550 + 100 mm - modular
550 + 100 mm - modular
SATA-5-PIN-A14400 + 120 + 120 + 120 mm - modular
400 + 120 + 120 + 120 mm - modular
400 + 120 + 120 + 120 mm - modular
300 + 120 mm - modular
PERIPHERAL-4-PIN-A5400 + 120 + 120 mm
300 + 120 mm
FDD-4-PIN-1-A1101 mm
Specifications are subject to change without prior notice.





TechPowerUp | Highly Recommended

December 4, 2014

“…more performance for the buck…”

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JonnyGURU | Recommended

November 10, 2014

“…mind blowing voltage stability…”

(Read More)

OCAHOLIC | Top Hardware – 5 Stars

September 16, 2014

“This high-end power supply is absolutely worthy of receiving five out of five stars.”

(Read More)

HWCol | Recomendacion Platino

January 16, 2014

“La serie X es una reconocida línea de producto de Seasonic debido a la calidad de sus componentes y la fortaleza de su estructura interna.”

(Read More)

PC Mania | 6 Stars

January 7, 2013

“…а частите, от които е изработено, са топ качество.”

(Read More)

Hardware Journal | Silent Award

May 15, 2012

“Die Praxis brachte dann die Bestätigung: das Netzteil geht als glasklare Silent Referenz aus dem Test hervor.”

(Read More)

Hardware Journal | Gold Award

May 15, 2012

“Nicht nur der äußere Aufbau zeugt von einer gewissen Exklusivität. Auch im Inneren findet man höchste Präzision und sehr gute Verarbeitungsqualität vor. Angefangen beim Lieferumfang, der klasse Aufmachung bis hin zur erstklassigen Verarbeitung – alles scheint nahezu perfekt abgestimmt.”

(Read More)

Pure Overclock | Editor’s Choice

April 30, 2012

“We didn’t experience any dropoff in the +12V rail when we pushed things to the limit, and the Hybrid fan mode is so good that we’re inclined to think there’s no reason to engage the Normal mode.
An excellent combination of features, technology, and performance, the SeaSonic X-Series 1050W is pure gold.”

(Read More)

RealHardTechX | Recommended

February 28, 2012

“La calidad de fabricación interior es magnífica. Solo se han utilizado componentes de la más alta calidad, excelentemente soldados, dimensionados con mucha generosidad y utilizados en una excelente plataforma diseñada con inteligencia … la X-1050 suministra la energía con sumo talento. La regulación de voltaje es casi perfecta, los niveles de ruido/rizado en las salidas están muy contenidos y la eficiencia alcanzada es extraordinaria.”

(Read More)