The power supply you have just purchased should be either an ATX 2.03 or an ATX12V form factor power
supply. An ATX 2.03 compliant power supply has a single 20-pin Main Power Connector and a 6-pin AUX
Power Connector to the motherboard. It also comes with six to eight 4-pin Peripheral Power Connectors
and one to two 4-pin Floppy Drive Power Connectors to your drives.
An ATX12V power supply has a single 20-pin Main Power Connector, a 6-pin AUX Power Connector
and a 4-pin +12V Power Connector to the motherboard. It also comes with six to eight 4-pin Peripheral
Power Connectors and one to two 4-pin Floppy Drive Power Connectors to your drives. It is a backwards
compatible power supply. If your motherboard does not support the AUX Power Connector or the +12V
Power Connector, you can still use this power supply.
This power supply is equipped with an intelligent electronic circuit that senses the temperature of the
power supply and regulates the speed of the fan. The speed of the power supply fan increases as
temperature rises. The power supply is also equipped with a 3-pin fan signal connector. Connect it to one
of the fan connectors on your motherboard. You may monitor the fan speed of the power supply through
your motherboard BIOS or through the monitoring software that comes with your motherboard. The power
supply comes with a main switch. Make sure you turn the switch to ON position before you boot up your
computer for the first time. Do not turn the switch to OFF position since the power supply is equipped with
soft on/off feature which turns you computer on and off through the soft switch on your computer case.
You may need to turn the switch to OFF position occasionally if your computer crashes and you cannot
shut down the computer through the soft switch.
Installation: Check the power supply voltage before installation. It should be the same as your local
power voltage (115V for USA and 230V for most of the European countries). Change the voltage setting
if necessary.
1. Disconnect the power cord from your old power supply.
2. Follow your computer case manual and open the case.
3. Disconnect all the power Connectors from the motherboard and the peripheral devices such as hard
drives, floppy drives, etc.
4. Remove the existing power supply from your computer case and replace it with the Antec power supply.
5. Connect the Power Connectors to your motherboard and peripheral devices.
6. Connect the 3-pin fan signal connector to one of the fan connectors on the motherboard.
Note: You do not need to connect the 3-pin fan signal connector in order to make the power supply work
if you choose not to monitor the speed of the fan.
7. Close the computer case.
8. Connect the power cord to the Antec power supply
Antec ATX12V / 2.03 Power Supply User's Manual
The ATX12V Power Supply Connector:
ATX and ATX12V Power Supply Connectors (Pin-side view, not to scale)
