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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

  • ColorBlack
  • TypeATX12V
  • Maximum Power550 W
  • Fans1 x 135mm Dual Ball Fan Bearing Fan
  • Main Connector20+4Pin
  • +12V RailsSingle

Options 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.

Highlights

  • 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

Specifications

BrandASUS
SeriesTUF GAMING
ModelTUF GAMING 550B
ColorBlack
TypeATX12V
Maximum Power550 W
Fans1 x 135mm Dual Ball Fan Bearing Fan
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector5
Max PSU Length150 mm
ModularNon-Modular
Energy-Efficient80 PLUS BRONZE Certified
ProtectionOPP / OVP / UVP / OCP / OTP
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current8 - 4A
Output+3.3V@25A, +5V@20A, [email protected] , [email protected] , +5VSB@3A
ApprovalsRoHS
Connectors1 x MB 24/20-pin
1 x CPU 4+4-pin
2 x PCI-E 6+2-pin
5 x SATA
4 x Peripheral
FeaturesCapacitors and chokes pass demanding tests to achieve Military-grade Certification.
Dual ball fan bearings can last up to twice as long as sleeve bearing designs.
A protective PCB coating protects against moisture, dust, and extreme temperatures.
An 80 Plus Bronze Certification is earned with high-quality components that pass rigorous testing.
Axial-tech fan design features a smaller fan hub that facilitates longer blades and a barrier ring that increases downward air pressure.
0dB technology lets you enjoy light gaming in relative silence.
Sleeved cables leave your rig looking tacti
Dimensions3.39" x 5.91" x 5.91"
Weight4.17 lbs.
Package ContentPower Cord x 1
Motherboard Power Cable x 1
CPU Cable 800mm x 1
PCI-E Cable x 1
SATA Cable x 2
Peripheral x 1
TUF Gaming sticker x 1
Shipping weight2.58 kg
Package size290 × 200 × 108 mm

Other versions of this model

3 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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