Built For The Long Haul
TUF Gaming series PSUs bring military-grade components and a robust cooling solution together to create a power platform you can depend on. High-quality capacitors and chokes undergo a myriad of tests, including extreme temperatures and vibration tests, to ensure they meet rigorous military specifications. An Axial-tech fan with a dual ball fan bearing design offers more longevity than other fan types, increasing the overall lifespan of the product. It's the perfect PSU to slot into a TUF Gaming rig or any DIY build designed to power through AAA games for years to come.

Military−grade Certification
Top marks

All critical capacitors and chokes in TUF Gaming PSUs are certified to military-grade specifications, ensuring reliable operation over a wide range of temperatures.

Dual Ball Fan Bearings
2x longer lifespan

Exemplary cooling is provided by a 135mm fan spinning on a dual ball bearing setup that will last up to twice as long as a sleeve bearing design.

80 Plus Bronze Certification
Brains and Bronze


The high-quality components used in TUF Gaming power supplies ensure efficient and reliable operation worthy of an 80 PLUS Bronze Certification. The efficiency also leads to low temperatures within the PSU, facilitating an even quieter acoustic profile for the 135mm Axial-tech fan.

Axial−tech Fan Design
Better, faster, stronger


Originally developed for top-end ROG graphics cards, Axial-tech fan design features a smaller fan hub that facilitates longer blades and a barrier ring that increases downward air pressure. For TUF Gaming series PSUs, we've scaled that design to 135mm so it keeps things cool at low RPMs while producing less noise.

0dB Technology
Quiet intelligence


An onboard controller brings the 135mm fan to a standstill when thermal design power (TDP) is below 30%, letting you enjoy light gaming in relative silence. Above 30% TDP, the fans automatically start up again.
Design
Fan diameter 13.5 cm
Number of fans 1 fan(s)
On/off switch Y
Features
Cooling type Active
Harmonized System (HS) code 84733020
Product colour Black
Internal I/O
Peripheral (Molex) power connectors (4-pin) 4
Packaging data
Cables included CPU, PCIe, SATA
Package type Box
Package weight 2.58 kg
Performance
80 PLUS certification 80 PLUS Bronze
Power supply unit (PSU) form factor ATX
Purpose PC
Ports & interfaces
CPU power cable length 80 cm
CPU power connector (4+4 pin) Y
Motherboard power connector 24-pin ATX
Number of SATA power connectors 5
PCI Express power cable length 60 cm
PCI Express power connectors (6+2 pin) 2
SATA power cable length 120,400 mm
Power
AC input voltage 100 - 240 V
Combined power (+12V) 549.6 W
Combined power (+3.3V) 120 W
Combined power (+5V) 120 W
Combined power (+5Vsb) 15 W
Combined power (-12V) 9.6 W
Input current 25 A
Max output current (+12V) 45.8 A
Max output current (+3.3V) 25 A
Max output current (+5V) 20 A
Max output current (+5Vsb) 3 A
Max output current (-12V) 0.8 A
Total power 550 W
Weight & dimensions
Depth 150 mm
Height 86 mm
Weight 1.89 kg
Width 150 mm

ASUS TUF-GAMING-550B power supply unit 550 W 24-pin ATX ATX Black

  • Brand: ASUS
  • Product Code: TUF-GAMING-550B
  • Availability: In Stock
  • $89.99