Asus P2-M2A690G - Manual (Page 56)

4-8 Chapter 4: Motherboard info
6. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for ATX power supply plugs. The plugs from the power
supply are designed to fit these connectors in only one orientation. Find the
proper orientation and push down firmly until the connectors completely fit.
• Do not forget to connect the 4-pin ATX +12 V power plug. Otherwise, the
system will not boot.
• Use of a PSU with a higher power output is recommended when
configuring a system with more power-consuming devices. The system
may become unstable or may not boot up if the power is inadequate.
• Ensure that your power supply unit (PSU) can provide at least the minimum
power required by your system.
7. Internal audio connectors (4-pin CD)
This connector allows you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.
Enable the CD-IN function in the audio utility when using this connector.