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User’s Manual / English
1. Overview
1.1 Introduction
Power Supply is a key component to meeting all power requirements of PC operation and
maintain continuous stability and reliability of a computer system. Cooler Master’s power supply lets
your PC operate more efficiently as power comes into your PC. It also enhances system reliability by
preventing abnormal supply from spikes and surges. In addition, the power supply provides your
system with perfect protection. The RS-550-ACLY is a standard ATX 12V V2.01 and EPS 12V V2.1
PS2 power supply that offers more power capacity for CPU usage.
1.2 Key Features
1. Compliance with the newest Intel standard ATX 12V V 2.01
2. Compliance with the newest SSI standard EPS 12V V2.1
3. Super silent operation with intelligent fan speed control (< 23dBA)
4. Power consumption management by human computer interface (HCI)
5. PCI-e connector satisfies high-end graphic card requirements
6. Su12V1, +12V2 and + 12V3 outputs for higher power usage
7. Green power design to meet energy star and blue angel requirements
8. More than 75% efficiency at typical load operation
9. Higher reliability (MTBF > 400,000 hours)
10. OVP / OCP / OTP / OLP / Short / Full protection
11. Active power factor correction (PF > 0.99)
12. Real power capacity satisfies high-end system operation
1.3 Model Descriptions
RS-550-ACLY: ATX-12V 550W Active PFC Power Supply
