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Black rectangular ATX power supply with a single 135mm fan and fixed cables

ASUS

ASUS TUF GAMING 550B 550 W power supply

SKU CH-FB92-H4TPB MPN TUF GAMING 550B

Delivers 550 W through a single +12 V rail with 80 PLUS Bronze efficiency, a 135 mm dual-ball-bearing fan and military-grade capacitors

  • Max wattage550 W
  • Modular cablingNon-Modular
  • Fan configuration1 × 135 mm Dual Ball Fan Bearing Fan
  • Main power connector20+4Pin
  • 12V railsSingle
  • PCIe power connectors2 × 6+2-Pin

Model ATX 80+ Bronze (550W)

  • Reliable power delivery with 550 W maximum output
  • Efficient 80 PLUS Bronze certification reduces energy waste
  • Quiet operation through 0dB technology at low loads
  • Durable dual ball fan bearings last longer than sleeve designs
  • Military-grade certified capacitors and chokes withstand demanding conditions

550 W ATX power supply

The ASUS TUF GAMING 550B delivers 550 W of continuous power through a single +12 V rail. It uses a non-modular ATX12V design with a 150 mm chassis that fits standard cases. An 80 PLUS Bronze rating confirms efficient operation across typical loads.

Suits mid-range builds needing fixed cables

Builders who prefer a simple, fixed cable loom will appreciate the included 20+4 pin main connector, 8-pin CPU connector, two 6+2 pin PCIe connectors and five SATA power plugs. Systems requiring fully modular cabling or higher wattage should consider other units.

Single +12 V rail with 550 W capacity

The single-rail design provides the full 550 W to the +12 V line, simplifying power distribution for modern graphics cards and CPUs. Protection circuits cover over-power, over-voltage, under-voltage, over-current and over-temperature conditions.

How it compares

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

Price $70.99
Cheaper than about 79% 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 nameASUS
Product lineTUF GAMING
Model nameTUF GAMING 550B
Product colorBlack
Product typeATX12 V
Ports & slots
PCIe power connectors2 × 6+2-Pin
SATA power connectors5
Output type+3.3 V@25A, +5 V@20A, +5VSB@3A
Connection types1 x MB 24/20-pin
1 x CPU 4+4-pin
2 x PCI-E 6+2-pin
5 x SATA
4 x Peripheral
Power
Max wattage550 W
Modular cablingNon-Modular
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS BRONZE Certified
Built-in protectionOPP / OVP / UVP / OCP / OTP
Supply voltage100–240 V
AC input frequency47–63 Hz
Rated input current8–4A
Size & build
Product dimensions3.39 in × 5.91 in × 5.91 in
Product weight4.17 lb (1.89 kg)
Shipping weight2.58 kg
Package size290 × 200 × 108 mm
Compatibility
PSU length limit150 mm
In the box
Included itemsPower Cord x 1
Motherboard Power Cable x 1
CPU Cable 800 mm x 1
PCI-E Cable x 1
SATA Cable x 2
Peripheral x 1
TUF Gaming sticker x 1
Environment & compliance
Regulatory approvalsRoHS
More details
Fan configuration1 × 135 mm Dual Ball Fan Bearing Fan

Other versions of this model

3 more in the same range

Questions about this item

How loud is the 135mm dual ball bearing fan when the 550W unit runs all day?

The 135mm dual ball bearing fan uses Axial-tech design and 0dB Technology, so it stops completely under light loads and runs quietly at higher loads for all-day operation.

Which cables are permanently attached to this non-modular 550W supply?

The fixed cables include a 20+4-pin motherboard connector, an 80cm 4+4-pin CPU connector, two 6+2-pin PCIe connectors, five SATA connectors and four peripheral connectors.

Will the single +12V rail and 150mm length fit my older ATX case and motherboard?

Yes, the single +12V rail delivers the full 550W to modern and legacy components, while the 150mm depth matches standard ATX bays and the 20+4-pin main connector works with both 20-pin and 24-pin motherboards.

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