GIGABYTE P550 SILVER
The Gigabyte P550SS is a 550 W 80 Plus Silver‑certified ATX power supply with ATX 3.0/3.1 support, a quiet 120 mm FDB fan, flat black cables, strong protections, and solid efficiency — ideal for everyday and entry‑level gaming PCs.
Features
The Gigabyte P550SS is a 550 W non-modular ATX power supply unit (PSU) designed to deliver reliable and efficient power for mainstream desktops, light gaming rigs, and productivity computers. It features 80 Plus Silver certification, which guarantees up to ~90 % efficiency at typical load, resulting in reduced energy wastage, lower heat generation, and quieter operation compared with lesser-rated units.
This PSU supports the Intel ATX 3.0 standard (compatible with ATX 3.1), ensuring proper power delivery and stability for current and future system builds. It comes with a 120 mm Fluid Dynamic Bearing (FDB) fan for effective cooling and a long lifespan, as well as flat, all-black fixed cables to simplify installation and cable routing.
Key Features
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550 W continuous power output suitable for mainstream desktops and light to moderate gaming setups.
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80 Plus Silver certification (90 % efficiency at typical load) for lower power loss and reduced heat.
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ATX 3.0 / ATX 3.1 compatible for modern power delivery standards.
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120 mm FDB fan for quieter, efficient cooling.
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Active Power Factor Correction (PFC) enhances voltage stability.
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Flat black cable design helps tidy cable routing in the case.
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Comprehensive protection suite (OVP, OPP, SCP, UVP, OCP, OTP).
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~3-year manufacturer warranty (region-dependent).
Technical Specifications
General Specifications
| Specification | Details |
|---|---|
| Model | GP-P550SS |
| Total Power Output | 550 W |
| Certificate | 80 Plus Silver (90 % typical) |
| Form Factor | ATX 12V v3.0 (compatible with ATX 3.1) |
| Modularity | Non-Modular |
| PFC | Active (> 0.9 typical) |
| Dimensions | 150 × 140 × 86 mm |
| MTBF | > 100,000 hours |
| Warranty | 3 years (region-dependent) |
Electrical Input & Performance
| Specification | Details |
|---|---|
| Input Voltage | 155 – 240 V AC |
| Input Current | 6.3 A |
| Input Frequency | 50 – 60 Hz |
| Power Good Signal Delay | 100 – 150 ms |
| Hold-Up Time | > 16 ms |
Cooling System
| Specification | Details |
|---|---|
| Fan Size | 120 mm |
| Fan Type | Fluid Dynamic Bearing (FDB) |
| Noise Level | Low-noise automatic speed control |
The FDB fan improves airflow with reduced noise and extended operational life compared with conventional fans.
Connector Configuration
| Connector Type | Quantity |
|---|---|
| ATX 20+4 Pin (Motherboard) | 1 |
| CPU/EPS 4+4 Pin | 1 |
| PCIe 6+2 Pin | 2 |
| SATA Power | 5 (in grouped sets) |
| Peripheral 4-Pin | 3 |
This connector set supports typical motherboard, CPU, GPU, storage, and peripheral requirements for mainstream builds.
Protection Features
The Gigabyte P550SS includes multiple built-in safety protections:
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OVP — Over-Voltage Protection
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UVP — Under-Voltage Protection
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OCP — Over-Current Protection
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OPP — Over-Power Protection
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SCP — Short-Circuit Protection
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OTP — Over-Temperature Protection
These safeguard connected hardware and the PSU itself against electrical hazards.
Advantages
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Silver efficiency offers higher efficiency than Bronze units, reducing energy waste.
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Modern ATX 3.0 compliance improves compatibility with recent components.
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Quiet cooling with FDB fan for lower operational noise.
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Comprehensive protections for system safety.
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Clean cable aesthetics with flat black design.
Conclusion
The Gigabyte P550SS SMPS is a solid choice for users building or upgrading mainstream desktops, productivity systems, or entry-level gaming PCs that require a 550 W power supply with good efficiency and reliability. With its 80 Plus Silver certification, ATX 3.0 compliance, quiet FDB cooling, and full suite of protections, it delivers efficient performance and dependable power delivery for everyday workloads.
While not modular, the flat cable design still allows for decent case airflow and neat routing. Its connector set and protections make it suitable for typical PC components, though heavier gaming rigs or enthusiast builds with high-end GPUs may benefit from higher-wattage or modular alternatives.