GIGABYTE P450B
The Gigabyte P450B is a 450 W 80 Plus Bronze‑certified non‑modular PSU offering reliable power with active PFC, an 85 % typical efficiency rating, a silent 120 mm fan, and essential protections for everyday and entry‑level gaming PCs.
Features
The Gigabyte P450B is a 450 W ATX power supply unit designed for mainstream desktop systems and basic gaming PCs. It’s built to meet the ATX 12V v2.31 standard and is 80 Plus Bronze certified, which means it delivers up to ~85 % efficiency at typical load — helping reduce wasted energy and lower heat output compared with non-certified PSUs.
This unit is non-modular with permanently attached flat black cables, simplifying installation while providing a sufficient connector set for most builds. It includes a 120 mm hydraulic bearing fan that adjusts speed automatically, balancing cooling and noise.
Key Features
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450 W continuous power output for everyday computing and entry-level gaming.
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80 Plus Bronze certification (~85 % efficiency) lowers operational losses.
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Active Power Factor Correction (PFC) improves voltage usage.
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120 mm silent hydraulic bearing fan for quieter operation.
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Flat, all-black fixed cables for a clean, simple installation.
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Comprehensive protection suite (OVP, OPP, SCP, UVP, OCP, OTP).
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Three-year warranty (varies by region/retailer).
Technical Specifications
General Specifications
| Specification | Details |
|---|---|
| Model | P450B |
| Type | Non-Modular ATX12V v2.31 PSU |
| Output Power | 450 W |
| Certification | 80 Plus Bronze |
| Efficiency | ~85 % typical |
| PFC | Active PFC (>0.9) |
| Warranty | ~3 years (varies by region) |
| MTBF | >100,000 hours |
Input & Power
| Specification | Details |
|---|---|
| Input Voltage | 100–240 V AC (full range) |
| Input Current | 4–8 A |
| Input Frequency | 50–60 Hz |
| Power Good Signal Delay | 100–500 ms |
| Hold-Up Time | >16 ms |
Connector Configuration
| Connector | Quantity / Type |
|---|---|
| 20+4-Pin ATX (Motherboard) | 1 |
| 4+4-Pin CPU/EPS | 1 |
| 6+2-Pin PCIe | 2 |
| SATA Power | 6 |
| 4-Pin Peripheral | 3 |
| 4-Pin Floppy | 1 |
This connector set supports typical system components like motherboard, CPU, multiple storage devices, and a discrete GPU up to its power rating.
Cooling
| Specification | Details |
|---|---|
| Fan Size | 120 mm |
| Bearing Type | Hydraulic Bearing (HYB) |
| Noise | Low noise with automatic speed control |
The large fan delivers efficient airflow while remaining relatively quiet under normal load.
Protections
This PSU includes multiple safeguards:
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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 help protect system components from electrical faults.
Advantages
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Bronze efficiency strikes a balance between cost and performance.
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Comprehensive protections for system safety.
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Quiet thermal solution with a 120 mm HYB fan.
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Ample fixed connector set for standard builds.
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Reliable MTBF suggests good longevity under normal use.
Conclusion
The Gigabyte P450B is a 450 W 80 Plus Bronze PSU built for users seeking a budget-friendly, reliable power solution for everyday desktops and entry-level gaming PCs. With active PFC, solid efficiency, multiple safety protections, and a quiet 120 mm fan, it delivers dependable power for typical system configurations.
While its non-modular design and 450 W limit mean it’s not suitable for high-end gaming rigs or future-proof builds, it’s a good choice for office PCs, light gaming systems, and basic upgrades where cost and simplicity matter.