does it come with a power cable (the power that plugs into the wall)?

Not a good thing to assume, but although the product is, as of right now, just sitting on the shelf as inventory, I have not had a PSU not have a power cord to the wall outlet, 120 that is

Where is the 550w variant made?

Their website says the corporation is in Taiwan and it's factory is in China.

I have a motherboard with a 4-pin CPU connector. The power cables supplied with this PSU don't include a 4-pin cable, only an 8-pin cable (2 x 4). Can I connect half of the pins in that cable to the 4-pin motherboard connector?

you should be able to just connect the 4 pin half and be ok.

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Main image of Seasonic FOCUS GM-550, 550W 80+ Gold, Semi-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 7 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-550FM

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Alt view image 6 of 8 - Seasonic FOCUS GM-550, 550W 80+ Gold, Semi-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 7 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-550FM

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Seasonic FOCUS GM-550, 550W 80+ Gold, Semi-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 7 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-550FM

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Options: ATX Gold (550W) Semi-Modular

SFX-L 80+ Gold (650W) Full-Modular
SFX-L 80+ Gold (450W) Full-Modular
SFX Platinum (750W)
SFX Gold (750W)
ATX 80+ Gold (650W) Semi-Modular
ATX 3.1 80+ Gold (1000W) Black
ATX 3.1 80+ Gold (850W) Black
ATX 3.1 80+ Gold (850W) White
ATX 3.1 80+ Gold (750W) Black
ATX 3.1 80+ Gold (750W) White
ATX Platinum (850W)
ATX Platinum (750W)
ATX Gold (1000W)
ATX Gold (850W)
ATX Gold (750W)
ATX Gold (550W) Semi-Modular
ATX 3.1 80+ Gold (1000W) White

COMPACT 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.
7 YEAR WORRY-FREE WARRANTY: Our commitment to superior quality.

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

Specs

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Seasonic FOCUS Semi-Modular Power Supply facing forward

Seasonic FOCUS Semi-Modular Power Supply size

Seasonic FOCUS Semi-Modular Power Supply internal structure

Seasonic FOCUS Semi-Modular Power Supply cables

General
Brand	SeaSonic
Series	FOCUS GM Series
Model	FOCUS GM-550 (SSR-550FM)

Details
Type	Intel ATX 12 V
Maximum Power	550 W
Fans	120mm Fluid Dynamic Bearing Fan
Main Connector	20+4Pin
+12V Rails	Single
PCI-Express Connector	2 x 6+2-Pin
SATA Power Connector	6
Max PSU Length	140 mm
Modular	Semi-Modular
Energy-Efficient	80 PLUS GOLD Certified
Over Voltage Protection	Yes
Input Voltage	100 - 240 V
Input Frequency Range	50/60 Hz
Input Current	8 - 4 A
Output	+3.3V@20A, +5V@20A, +12V@45A, [email protected], +5VSB@3A
MTBF	100,000 hours MTBF @ 25 C, excl. fan
Approvals	cTUVus, TUV, CB, CCC, BSMI, EAC, RCM
Connectors	1 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 Spec	20/24Pin 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)

Features
Features	COMPACT 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.

Dimension & Weight
Dimensions	3.39" x 5.91" x 5.51"
Weight	3.77 lbs.

Additional Information
First Listed on Newegg	January 13, 2026

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Seasonic FOCUS GM-550, 550W 80+ Gold, Semi-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 7 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-550FM

Learn more about the SeaSonic USA FOCUS GM-550 (SSR-550FM)

Customer Reviews of the SeaSonic USA FOCUS GM-550 (SSR-550FM)

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Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info

Item#: 9SIBZW0KPB9304

Meet Your Seller

Seasonic FOCUS GM-550, 550W 80+ Gold, Semi-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 7 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-550FM

Learn more about the SeaSonic USA FOCUS GM-550 (SSR-550FM)

Customer Reviews of the SeaSonic USA FOCUS GM-550 (SSR-550FM)

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info