ECS PF21 Extreme User Manual page 13

3. ATX1 (ATX PWR Connector, 24 pin, White)
AC power cord should only be connected to your power supply until
after ATX power cable and other related devices are firmly connected to
the motherboard. Make sure that your ATX12V power supply could
provide 8A of 12V and at least 1A on the +5V standby. The minimum
recommended power is 300W for a fully-configured system. If not, the
system may become unstable or may not even boot up.
4. IDE1 (IDE1 Connector, 40-1 pin, Green)
IDE1 is supported by ICH6R South Bridge. Please connect the first hard
disk to IDE 1. The streamline IDE cable must be the same side with the
Pin 1.
1-8
5. FDD1 (Floppy Connector, 34-1 pin, Black)
Please connect the floppy drive ribbon cables to FDD. It supports
360K, 12M, 720K, 1.44M and 2.88M bytes floppy disk types.
6. Batter y
Danger of explosion if battery is incorrectly replaced. Replace only with
the same of equivalent type recommended by the manufacturer.