Power Supply

What are the voltage ranges for outlets in the US and Europe

1. US - 110-120 VAC

2. Europe - 220-240 VAC

How do you adjust the supplied voltage on a power supply

By using a manual voltage selector on the back of the device or automatically by the device. If it has a manual selector, it is a fixed-input device. If it does it automatically, it is a auto-switching PSU

What current is supplied to most internal components

DC

What PC components operate at voltages up to 3.3V

1. NVMe M.2 slots

2. RAM slots

What PC components operate at the 5V voltage rail

USB ports and devices

What PC components typically operate on the 12V voltage rail

1. Mechanical parts

2. Graphics cards

3. PCIe expansion cards

What connector do most power supplies use

A 20+4 pin connector or a 24 pin connector to be used with both 20 and 24 pin motherboards

What device is required for a load-balancing setup where power is split between multiple PSUs that automatically share the load and provide backup in case of a PSU failure

Redundant power supply

What is a power supply where cables can be detached and reattached as needed

Modular power supply

What is the unit of measure that PSUs are rated in

Watt

What rating system do you consider with energy efficiency

80 PLUS (Higher rating means more efficient)