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Black rectangular ATX power supply with 120mm fan and sleeved cables

Corsair

Corsair CX550 CP-9020121-NA 550W power supply

SKU CH-HD5S-3E4WH MPN CP-9020121-NA

A 550 W ATX power supply with 80 Plus Bronze efficiency, a single +12 V rail, two PCIe 6+2 connectors, five SATA connectors and a thermally controlled 120 mm fan

  • TypeATX12V / EPS12V
  • Maximum Power550 W
  • Fans1 x 120mm Thermally Controlled Rifle Bearing Fan
  • PFCActive
  • Main Connector24Pin
  • +12V RailsSingle

Options CX Series (550W)

  • 80 PLUS Bronze certification reduces waste heat and lowers electricity draw
  • Thermally controlled 120 mm rifle-bearing fan keeps noise low across varying loads
  • Single +12 V rail design simplifies cable routing for modern GPUs and CPUs
  • Compact 140 mm depth fits smaller ATX cases without crowding components
  • 100 000 hour MTBF rating indicates long-term reliability under continuous operation

CX Series 550 W ATX supply

The Corsair CX550 is a 550 W ATX12V power supply built for mainstream desktop builds. It carries 80 Plus Bronze certification and active PFC for efficient power delivery. A single +12 V rail and LLC resonant topology with DC-to-DC conversion support modern CPUs and chipsets. The unit measures 140 mm in length.

Black sleeved cables and quiet fan

All cables feature black sleeving and connectors for a clean internal appearance. The thermally controlled 120 mm rifle-bearing fan adjusts speed with load to keep noise low. Included connectors are one 24-pin ATX, one EPS12V 4+4-pin, two PCIe 6+2-pin, five SATA and four PATA plugs. Over-voltage protection is built in.

Suits mid-range gaming and office PCs

This supply fits systems drawing up to 550 W with one or two graphics cards needing 6+2-pin power. Builds requiring more PCIe connectors, higher wattage or modular cabling should consider other models. The 100–240 V input works worldwide without a voltage switch. Approvals include UL, CE, TUV and RoHS compliance.

Puntos fuertes

  • 80 PLUS Bronze certification reduces waste heat and lowers electricity draw
  • Thermally controlled 120 mm rifle-bearing fan keeps noise low across varying loads
  • Single +12 V rail design simplifies cable routing for modern GPUs and CPUs
  • Compact 140 mm depth fits smaller ATX cases without crowding components
  • 100 000 hour MTBF rating indicates long-term reliability under continuous operation

Especificaciones

BrandCORSAIR
SeriesCX Series
ModelCX550
TypeATX12V / EPS12V
Maximum Power550 W
Fans1 x 120mm Thermally Controlled Rifle Bearing Fan
PFCActive
Main Connector24Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector5
Max PSU Length140 mm
Energy-Efficient80 PLUS BRONZE Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current6.30 - 3.15 A
Output+3.3V@25A, +5V@20A, [email protected] , [email protected] , +5VSB@3A
MTBF100,000 hours
ApprovalsFCC, ICES, CE, UL, cUL, RCM, TUV, CB, CCC, BSMI, EAC, RoHS, WEEE, KC
Connectors1 x 24-pin ATX
1 x EPS12V/ATX12V (4+4)
2 x PCIe (6+2)
5 x SATA
4 x PATA
Features80 Plus Bronze: Runs cooler and uses less power than less efficient power supplies
Black housing, cable sleeving and connectors: Give your build the high-end look without breaking the bank
Thermally controlled 120mm fan: Quiet operation across a wide range of loads
LLC resonant topology with DC to DC: Ensures improved efficiency at lower loads and compatibility with all modern day chipsets and CPUs
Over-voltage protection, under-voltage protection, short circuit protection, over power protection, and over temperature protection provide maximum safety to your critical system component
Dimensions5.91" x 5.51" x 3.39"
Weight3.81 lbs.
Package ContentCX Series ATX Power Supply
Power Cord
4 x Mounting Screws
Pack of Zip-ties
Warranty Document
Peso de envío2.25 kg
Dimensiones del paquete269 × 188 × 102 mm

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Preguntas sobre este artículo

How long is the rifle-bearing fan rated to run before it may need replacement?

The fan is part of a unit with a 100000-hour MTBF, so the fan itself is designed for very long service life under normal loads.

What thermal limit triggers the fan to spin faster during sustained full-load operation?

The thermally controlled 120mm fan ramps speed based on internal temperature, keeping the unit within its 80 Plus Bronze efficiency envelope up to 550 W continuous output.

How much waste heat and noise does the supply produce when running at typical load all day?

At typical loads the 80 Plus Bronze efficiency keeps waste heat low, and the thermally controlled 120mm rifle-bearing fan stays quiet while maintaining safe temperatures.

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