A dual rail power supply refers to a type of power supply unit (PSU) that has multiple +12V rails. In a traditional power supply, there is usually a single +12V rail that provides power to all components in the computer system. However, in a dual rail design, the total +12V amperage capability is split among two or more separate circuits.
The purpose of having multiple +12V rails is to distribute the power more evenly and safely among the components. By dividing the load across multiple rails, the PSU can handle higher power demands without overloading a single rail. This can help prevent overheating, voltage drops, and other potential issues that could arise from overloading a single rail.
One advantage of a dual rail power supply is that it can provide more stable and reliable power to the system. When a computer system is under heavy load, such as when running demanding applications or playing graphics-intensive games, the components draw more power. With a dual rail design, the load is distributed across multiple rails, reducing the strain on any single rail and ensuring that each component receives the power it needs.
Additionally, a dual rail power supply can provide added protection in case of a short circuit or other electrical fault. If a fault occurs on one rail, the other rail(s) can continue to supply power to the system, minimizing the risk of a complete power failure. This can be particularly important in critical applications where uninterrupted power supply is essential.
It is worth noting that not all power supplies use a dual rail design. Some PSUs have a single +12V rail, while others may have quad rails or even more. The choice between different rail configurations depends on the specific power requirements of the system and the manufacturer’s design choices.
A dual rail power supply is a type of PSU that divides the total +12V amperage capability among multiple circuits. This design helps distribute power more evenly and safely, providing more stable and reliable power to the components. It can also offer added protection in case of electrical faults.