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Black ATX power supply unit with 120 mm fan and fixed cables

ASRock

ASRock Challenger CL-550B 550W 80 PLUS Bronze Non-Modular Power Supply

SKU CH-ZCMC-0D73S MPN CL-550B

A 550 W ATX power supply with 80 PLUS Bronze efficiency, a 120 mm golf-blade fan, and non-modular cables including 24 pin ATX, 8 pin EPS, two 8 pin PCIe, and four SATA connectors

  • Max wattage550 W
  • Modular cablingNon-Modular
  • Fan configuration1 × 120 mm
  • Efficiency certification80 PLUS BRONZE Certified
  • Connection types1 × 24 pin ATX / 1 × 8 pin (4+4) EPS (CPU) / 2 × 8 pin (6+2)
  • Product colorBlack

Model ATX 80+ Bronze (550W)

  • Delivers 550 W continuous power for stable system operation
  • 80 PLUS Bronze certification reduces wasted energy and heat
  • 120 mm golf-blade fan moves air quietly under load
  • 5 V BOOST function maintains steady voltage on the 5 V rail
  • Comprehensive safety protections guard components during power fluctuations

550 W ATX Bronze power supply

The ASRock Challenger CL-550B delivers 550 W of continuous power through a non-modular ATX design. It carries 80 PLUS Bronze certification and uses a single 120 mm golf-blade fan for cooling. A built-in 5 V boost function helps maintain stable voltage on the minor rail. The unit includes a five-year manufacturer warranty.

Entry-level builders and basic upgrades

This supply suits builders assembling a mid-range system with a single graphics card and a handful of drives. It provides one 24 pin ATX connector, one 8 pin EPS connector, two 8 pin PCIe connectors and four SATA connectors. Systems that require fully modular cabling, higher wattage headroom or more PCIe power leads should consider a different model.

Connector count and case clearance

Verify that your motherboard uses a standard 24 pin ATX and an 8 pin EPS socket. Confirm the graphics card needs no more than two 8 pin PCIe plugs. Ensure the chassis can accommodate a non-modular cable bundle and a 120 mm fan profile. Check that four SATA power plugs cover your storage devices.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $47.99
Cheaper than about 91% of the 10,869 comparable items (median $142.99).
Max wattage 550 W
Lower than about 82% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameASRock
Model nameCL-550B
Product colorBlack
Product typeATX
Ports & slots
Connection types1 × 24 pin ATX / 1 × 8 pin (4+4) EPS (CPU) / 2 × 8 pin (6+2) PCIe / 4 x SATA
Power
Max wattage550 W
Modular cablingNon-Modular
Efficiency certification80 PLUS BRONZE Certified
Size & build
Shipping weight2.72 kg
Package size279 × 203 × 102 mm
More details
Fan configuration1 × 120 mm

Other versions of this model

1 more in the same range

Questions about this item

Will the 550 W unit supply enough power for a mid-range graphics card and a modern CPU?

The 550 W rating and 80 PLUS Bronze efficiency give headroom for typical mid-range builds with one graphics card and a current processor.

Does the non-modular cable set include the connectors my motherboard and GPU need?

The fixed cables provide one 24-pin ATX, one 8-pin EPS split as 4+4, two 8-pin PCIe split as 6+2, and four SATA plugs.

How loud is the 120 mm golf-blade fan under load?

The 120 mm golf-blade fan is designed for quiet airflow; noise stays low at typical loads and rises only when the unit approaches its maximum output.

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