The Cooler Master MasterWatt 550W 80+ Bronze Semi Modular Power Supply (MPX-5501-AMAAB-AU) is a dependable, high-quality power delivery unit tailored for everyday desktop configurations, budget-friendly gaming rigs, and office systems. Supplying 550 watts of stable continuous power, it provides a highly practical and secure foundation for running mainstream computational workloads and mid-tier components.
This unit integrates an advanced dual-forward and DC-to-DC circuit design to assure absolute voltage regulation and structural stability across the critical +3.3V and +5V rails. Incorporating certified energy performance alongside heavy-duty safety protections, its specialized semi-fanless thermal layout ensures completely silent desktop operations during lower power output thresholds.
Key Features & Specifications
80 Plus Efficiency: certified rating (Bronze/Gold/Platinum/Titanium) for reduced heat and improved power usage.
Modular Cabling: fully modular, semi‑modular, or fixed cables depending on the model for cleaner airflow.
Low-Noise Cooling: quiet fan design such as FDB, hydraulic bearing, or zero‑RPM mode.
Comprehensive Protections: includes OVP, OPP, SCP, UVP, OTP, and OCP for safe and stable operation.
The Computer Guy Charmhaven Advantage
In-Store Advice: We can help you choose the correct wattage, confirm GPU connector compatibility, and ensure your case supports the PSU’s form factor and cable lengths.
Local Support & Advice: Our Charmhaven technicians can assist with cable routing, load balancing, and verifying correct EPS/PCIe power connections.
$79.00
In stock
%20Specs.webp)
| Weight | 2 kg |
|---|---|
| Dimensions | 27 × 20 × 12 cm |
Important Product Information
Compatibility: Ensure your case supports the PSU’s form factor (ATX/SFX) and that cable lengths suit your chassis layout.
Local Support: Our team can advise on installation, cable management, and selecting the right wattage for future upgrades.
Specifications Table
| Feature | Specification |
| Model Number | MPX-5501-AMAAB-AU |
| Form Factor | ATX |
| Wattage | 550W |
| 80 Plus Rating | Bronze |
| Modular Type | Semi-Modular |
| Fan Type | LDB (Loop Dynamic Bearing) |
| Fan Size | 120mm |
| Input Voltage | 100V – 240V |
| Protections | OCP, OVP, UVP, OPP, OTP, SCP |
| Cable Type | Flat Ribbon and Fixed Sleeved |
| Cable Lengths | Main 24-pin, EPS 4+4 pin, PCIe 6+2 pin, SATA, Peripheral |
| Connector Count | 1x ATX 24-Pin, 1x EPS 4+4 Pin, 2x PCIe 6+2 Pin, 6x SATA, 2x Peripheral 4-Pin, 1x FDD |
| Efficiency | 85% @ Typical Load (80 PLUS Bronze Certified) |
| What’s Included | PSU, modular cables, mounting screws, manual |
