Seasonic FOCUS GX FOCUS GX-550 (SSR-550FX)
 | Outdated Product A fairly advanced model from the popular Taiwanese manufacturer Sonic Electronics Co., which specializes in the production of power supplies for desktop computers and laptops. One of the distinguishing features of the device is the presence of extremely wide functionality. So, this PSU received a hybrid active cooling system Hybrid Silent Fan Control: a 120-mm fan is capable of operating in several modes (we are talking about standard and semi-passive cooling), but if necessary, airflow can be completely turned off by assigning heat to passive radiator cooling . The Sea Sonic Focus Plus Gold SSR-550FX power supply fan is based on the innovative Fluid Dynamic Bearing (FDB), which is also used in the older modifications of this PSU line. The service life of the bearing assembly is 100,000 ho...urs. The power supply boasts an 80 Plus Gold certification. Wired connection is based on the principle of modular design. Even the main wires used to power the motherboard (20 + 4) and CPU (4 + 4) can be disconnected from the PSU case. Additionally, the wiring harness provides: 6 SATA, 3 IDE, 2 PCIe. The widest range of protective systems is involved in this power supply. The PSU is represented by an ATX-format case. |
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Efficiency 90%. Flagship circuitry and element base. Hybrid cooling system. 10 year warranty. Stable operation even with a slight overload. Modular design. Quiet even under heavy load.
A fairly advanced model from the popular Taiwanese manufacturer Sonic Electronics Co., which specializes in the production of power supplies for desktop computers and laptops. One of the distinguishing features of the device is the presence of extremely wide functionality. So, this PSU received a hybrid active cooling system Hybrid Silent Fan Control: a 120-mm fan is capable of operating in several modes (we are talking about standard and semi-passive cooling), but if necessary, airflow can be completely turned off by assigning heat to passive radiator cooling .
The Sea Sonic Focus Plus Gold SSR-550FX power supply fan is based on the innovative Fluid Dynamic Bearing (FDB), which is also used in the older modifications of this PSU line. The service life of the bearing assembly is 100,000 hours. The power supply boasts an 80 Plus Gold certification. Wired connection is based on the principle of modular design. Even the main wires used to power the motherboard (20 + 4) and CPU (4 + 4) can be disconnected from the PSU case. Additionally, the wiring harness provides: 6 SATA, 3 IDE, 2 PCIe. The widest range of protective systems is involved in this power supply. The PSU is represented by an ATX-format case.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Seasonic 2026 - new arrivals, bestsellers, and the most relevant models Seasonic.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Seasonic 2026 - new arrivals, bestsellers, and the most relevant models Seasonic.
Series Seasonic FOCUSCompare using chart →
1000 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
850 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
750 W, 24+8+8(4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
850 W, 24+8 (4+4) pin, 6 x 6+2 pin, SATA 8, Molex 3, ATX, semi-modular, Efficiency 87 %, semi-passive СО, mining, certificate 80+ Gold, warranty 7 years
1000 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
850 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
750 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 6, Molex 3, SFX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
750 W, 24+8+8(4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
750 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 8, Molex 3, ATX, modular, Efficiency 92 %, semi-passive СО, certificate 80+ Platinum, warranty 10 years
850 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 10, Molex 3, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
650 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 8, Molex 3, ATX, modular, Efficiency 92 %, semi-passive СО, certificate 80+ Platinum, warranty 10 years
650 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 6, Molex 3, SFX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
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Power Supply Unboxing: SeaSonic FOCUS Plus Gold 650W
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Seasonic Focus GX-750 GOLD Unboxing 4k
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unboxing Seasonic Focus GX 650W 80 PLUS Gold Full Modular
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Model overview based on user reviews
The Seasonic FOCUS GX series is highly praised for its top-notch workmanship and excellent efficiency, making it a reliable choice for consumers. Users appreciate the quiet operation and the option to disable passive cooling, which adds to its versatility. The power supply comes with long cables and a rich set of accessories, including bags and testers, enhancing its value. It features a 10-year warranty, ensuring long-term reliability. Although some users noted the unit's heaviness and a slight fan noise in complete silence, these are minor concerns compared to its overall performance. The Seasonic FOCUS GX is recommended for those seeking a high-quality power supply with a reasonable budget.
Pros
Cons
0 0 1 3 |
Official BP. The equipment is generally royal, bags, boxes, sachets)) To be honest, I did not expect this from a PSU for 120 bucks. The wires are long, those for additional power are also separated (6 + 2 or 8) All in an iron braid, in short, I'm delighted). What is the button to disable or enable passive cooling. I didn't know about this at all. I measured the efficiency (output) in the load, it turned out 88% when applying 500 watts! It is not audible at all at low and medium loads, at high it is audible, but weakly. Doesn't overheat. I looked at the layout under the set, everything is very neatly done. I found a disassembled photo on the Internet, everything is on Japanese spare parts, almost all polymer capacitors. There is also a sense of heaviness. and something noble. I put it in the computer and I’m 100% sure that it will plow for more than one year. I hope my review will help someone decide, but I'm very pleased. The workmanship is top notch. Good fit and attention to detail. Long cables + separated by pins. Excellent efficiency. Quiet. No  Anton Chijik: use Seasonic FOCUS GX-550 few months |
It's too early to evaluate. a couple of months in the work. but the supply is really rich. all in bags. the turntable is quiet. module .plus version was with tester. Semi-passive cooling. 650w cost 120€. Sisonik. cooling mode. 10 years warranty. filling . 80+G It's too early to say. I hope he can be trusted with a computer. starpom: use Seasonic FOCUS GX-650 few months |
The same filling is in Antec EA650G Pro. Quality. Heavy (but that's a plus). |
3 out of 4 user review(s) shown
1 more user review(s)
We recommendCompare using chart →
600 W, 24+8 (4+4) pin, 4 x 6+2 pin, SATA 6, Molex 3, SFX, modular, Efficiency 92 %, certificate 80+ Gold
550 W, 24+8 (4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
650 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 6, Molex 3, SFX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
650 W, 24+8 (4+4) pin, 4 x 6+2 pin, SATA 9, Molex 4, ATX, modular, Efficiency 90 %, semi-passive СО, certificate 80+ Gold
550 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 6, Molex 3, ATX, Efficiency 88 %, warranty 5 years
650 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 6, Molex 3, ATX, semi-modular, Efficiency 90 %, warranty 2 years
650 W, 24+8 (4+4) pin, 4 x 6+2 pin, SATA 7, Molex 2, ATX, Efficiency 88 %, warranty 3 years
500 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 4, Molex 4, TFX, Efficiency 90 %, certificate 80+ Gold
750 - 1600 W, ATX, modular, 24+8+8(4+4) pin, 3 - 8 x 6+2 pin, 1 / 2 x 16 pin, SATA 9 / 12, Molex (IDE) 3 / 6