Connecting The Power Supply Cable; Powering Up - ECS KV2 Extreme User Manual

2.8 Connecting the Power supply cable

The ATX power connector is keyed for proper insertion. There are two
connectors 4-pin and 20-pin ATX power cable. The plastic clip on the
power connector should lock over the plastic tab on the motherboard
power connector.
20-pin ATX 4-pin ATX
power connector
power connector

2.9 Powering up

Turn on the power to the monitor and the computer. If necessary,
format your hard disk drive and install an operating system.
2-5