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Rectangular black metal PSU with 120mm fan grill and modular cable sockets

Seasonic

Seasonic FOCUS GM-550 550W 80+ Gold Semi-Modular power supply

SKU CH-RJMW-C0TJG MPN FOCUS GM-550

Delivers 550 W through a single +12 V rail with 80 PLUS Gold efficiency in a 140 mm semi-modular chassis

  • TypeIntel ATX 12 V
  • Maximum Power550 W
  • Fans120mm Fluid Dynamic Bearing Fan
  • Main Connector20+4Pin
  • +12V RailsSingle
  • PCI-Express Connector2 x 6+2-Pin

Options ATX Gold (550W) Semi-Modular

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  • 80 PLUS Gold efficiency cuts wasted energy during conversion
  • 140 mm depth fits all ATX cases for easy installation
  • Semi-modular cabling keeps unused wires out of the airflow path
  • 120 mm fluid-dynamic-bearing fan runs under smart silent control for quiet operation
  • Single +12 V rail delivers 45 A for stable GPU power

Compact 140 mm ATX Power Supply

The Seasonic FOCUS GM-550 delivers 550 W through a single +12 V rail rated at 45 A. Its 140 mm depth fits every standard ATX chassis while the 80 PLUS Gold rating keeps conversion losses low. A 120 mm fluid-dynamic-bearing fan runs under smart speed control for quiet operation.

Semi-Modular Cabling and Straightforward

Fixed 20+4 pin ATX and 8-pin CPU cables are permanently attached; two PCIe 6+2 pin and six SATA leads detach to reduce clutter. Cable lengths of 610 mm, 650 mm and 750 mm reach full-size boards without strain. The only common snag is routing the stiff 24-pin loom behind tight motherboard trays.

Mid-Range Builds and Upgraders

This unit suits mainstream gaming PCs drawing up to 550 W from a single GPU and multiple drives. Builders planning dual high-end cards or extreme overclocks should look at higher-wattage models instead.

Ciri-ciri utama

  • 80 PLUS Gold efficiency cuts wasted energy during conversion
  • 140 mm depth fits all ATX cases for easy installation
  • Semi-modular cabling keeps unused wires out of the airflow path
  • 120 mm fluid-dynamic-bearing fan runs under smart silent control for quiet operation
  • Single +12 V rail delivers 45 A for stable GPU power

Spesifikasi

BrandSeaSonic
SeriesFOCUS GM Series
ModelFOCUS GM-550 (SSR-550FM)
TypeIntel ATX 12 V
Maximum Power550 W
Fans120mm Fluid Dynamic Bearing Fan
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector6
Max PSU Length140 mm
ModularSemi-Modular
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current8 - 4 A
Output+3.3V@20A, +5V@20A, +12V@45A, [email protected] , +5VSB@3A
MTBF100,000 hours MTBF @ 25 C, excl. fan
ApprovalscTUVus, TUV, CB, CCC, BSMI, EAC, RCM
Connectors1 x Main Power (24/20 pins)
1 x CPU (8/4 pins)
2 x PCIe (8/6 pins)
6 x SATA
3 x Peripheral
Cable Spec20/24Pin MB: One cable (610mm)
8/4+4Pin CPU: One cable (650mm)
PCI-E 6+2Pin: Two cables (750mm)
4 x SATA: One cable (450+120+120+120mm)
2 x SATA: One cable (450+120mm)
3 x Molex: One cable (450+120+120mm)
FeaturesCOMPACT SIZE: 140mm deep fits all ATX systems.
SEMI MODULAR: Provides the most common connections while allowing flexibility on the peripherals to reduce clutter and maximize airflow for a better ventilated system.
80 PLUS GOLD: Less energy gets wasted during power conversion; Cut down your electricity usage and be Eco-Friendly.
SMART and SILENT FAN CONTROL: 120 mm FDB fan inside is regulated by Seasonic Smart and Silent Fan Control technology(S2FC), which optimizes the fan speed according to the needs of the system to create a more silent and comfortable experience.
Dimensions3.39" x 5.91" x 5.51"
Weight3.77 lbs.
Berat penghantaran2.43 kg
Dimensi bungkusan277 × 185 × 119 mm

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How can I confirm the FOCUS GM-550 is delivering stable power after installation?

The 80 PLUS Gold certification means the unit meets strict efficiency targets at 20, 50 and 100 per cent load, and the single +12V rail rated at 45A provides consistent voltage to the GPU and CPU under heavy demand.

Which cables are permanently attached and which ones must be added from the modular set?

The 20+4 pin motherboard cable (610mm) and the 8/4+4 pin CPU cable (650mm) are fixed; the two PCIe 6+2 pin cables (750mm each), the SATA cables and the Molex cable are modular and can be left out if not needed.

Is the 550W capacity enough for a build with an RTX 30 or 40 Super card?

The supplier title lists RTX 30/40 Super compatibility; with a single +12V rail at 45A and two PCIe 6+2 pin connectors the unit can supply the 12V power those cards require, provided total system draw stays within 550W.

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