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Rectangular steel PSU in matte black with fixed flat cables and a 120mm fan grille

GIGABYTE

GIGABYTE GP-P550B power supply

SKU CH-HX73-8B476 MPN GP-P550B

550 W ATX 12V v2.31 unit with 80 PLUS Bronze efficiency, single +12 V rail, 120 mm hydraulic-bearing fan and full protection suite

  • TypeATX 12V v2.31
  • Maximum Power550 W
  • Fans1 x 120mm Silent Hydraulic Bearing (HYB) Fan
  • PFCNo
  • Main Connector20+4Pin
  • +12V RailsSingle

Options ATX 80+ Bronze (550W)

  • 80 PLUS Bronze certified for 85% efficiency at typical load
  • Single +12V rail delivers stable power output for hardware compatibility
  • 120mm Silent Hydraulic Bearing fan adjusts speed for noise reduction
  • Flat cables reduce clutter and improve airflow inside the case
  • Multiple protections including OVP, OPP, SCP, UVP, OCP, OTP

Power for mainstream builds

The GIGABYTE GP-P550B is a 550 W ATX 12V v2.31 power supply built for standard desktop systems. It carries 80 PLUS Bronze certification with 85% efficiency at typical load. A single +12 V rail delivers stable power to the CPU and graphics card. The unit uses a non-modular design with flat cables to reduce clutter inside the case.

Compatibility checklist

Confirm your case accepts a power supply up to 140 mm in length and has room for the fixed cable bundle. The main motherboard connector is a 20+4 pin plug and two 6+2 pin PCIe connectors are provided for graphics cards. Three SATA power connectors are available for drives. Input voltage covers 100-240 V at 50/60 Hz for worldwide use.

Thermals and power behaviour

A 120 mm hydraulic bearing fan adjusts speed based on load to balance cooling and noise. The Bronze-rated efficiency reduces waste heat at normal loads. Protections include OVP, OPP, SCP, UVP, OCP and OTP. Hold-up time is at least 16 ms and the power good signal arrives within 100-500 ms.

Privalumai

  • 80 PLUS Bronze certified for 85% efficiency at typical load
  • Single +12V rail delivers stable power output for hardware compatibility
  • 120mm Silent Hydraulic Bearing fan adjusts speed for noise reduction
  • Flat cables reduce clutter and improve airflow inside the case
  • Multiple protections including OVP, OPP, SCP, UVP, OCP, OTP

Specifikacijos

BrandGIGABYTE
ModelGP-P550B
TypeATX 12V v2.31
Maximum Power550 W
Fans1 x 120mm Silent Hydraulic Bearing (HYB) Fan
PFCNo
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector3
Max PSU Length140 mm
ModularNon-Modular
Power Good Signal100-500ms
Hold-up Time16ms min.
Efficiency85% at typical load
Energy-Efficient80 PLUS BRONZE Certified
ProtectionOVP / OPP / SCP / UVP / OCP / OTP
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current8 - 4 A
Output+3.3V@18A, +5V@15A, [email protected] , [email protected] , +5VSB@3A
MTBF>100,000 Hours
Connectors1 x ATX/MB 20+4 Pin
1 x CPU/EPS 4+4 Pin
2 x PCI-e 6+2 Pin
6 x SATA
4 x Peripheral 4 Pin
1 x Floppy
SLINo
CrossFireNo
Features80 PLUS Bronze certified
120mm Silent Hydraulic Bearing (HYB) Fan
Reliable flat cable
Single +12V rail
OVP/OPP/SCP/UVP/OCP/OTP protection
3 years warranty (Adjusted according to different regions)
Dimensions3.39" x 5.91" x 5.51"
Siuntos svoris2.27 kg
Pakuotės dydis305 × 203 × 152 mm

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What cables come attached and what must I add?

The unit ships with a fixed 20+4 pin main connector, two 6+2 pin PCIe plugs and three SATA power leads; no modular cables are included so nothing extra can be added.

How do I decide if the 550 W bronze unit fits my build?

Pick this 550 W model when your peak system draw stays below the rated maximum; the single +12V rail and 85% typical efficiency suit mid-range gaming or workstation configurations.

What does the 85% efficiency figure mean once installed?

At typical load the PSU converts 85% of wall power into usable DC output, so less energy becomes heat and the 120 mm hydraulic fan runs quieter.

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