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Introduction

The PSU (a.k.a. power supply unit) is virtually the heart of the computer. It is a vitally important part that delivers power to components that comprise the computer system. A high-quality power supply can make the difference between a perfect machine and an unreliable one. Getting to know the importance of the power supply is just the first step, and getting the right PSU for your system means looking beyond just enormous power output.

Understanding PSU Specifications
PFC, efficiency, power connectors, and special designs such as modular cabling and SLI/CrossFire support are all features that define one PSU product from another. Newegg.com provides a wide selection of power supply products from the manufacturers you trust in all form factors, including ATX, ATX12V, EPS12V, SFX12V for your customized system. For full information, please see our PSU Buying Guide.

Power Supplies Learning Center library

Power Supply Buying Guide
Power Supply Installation Guide
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Power Supplies