How to Install an ATX Power Supply in a Computer

Personal computers are often underpowered for many of the software applications and games available to them. Power supplies assist the transfer of power to critical areas of need on the motherboard. Too many devices utilizing power can slow a computer considerably leaving the operator no choice but to upgrade the power supply.

Difficulty: Moderate

Instructions

Things You'll Need:

• ATX power supply
• Screwdriver

1. Disconnect all power to the computer by removing the power cord from the rear of the system. Press and hold the power switch for several seconds to dissipate any residual charge.

2. Open the computer case using a screwdriver to expose the internal hardware. Touch the inside of the case to discharge any built up static electricity.

3. Remove the existing ATX power supply by disconnecting all of the power cable connections running from the power supply to the motherboard. Unplug any peripheral devices at this time.

4. Unscrew the screws holding the ATX power supply in place at the rear of the computer case, and set them aside for assembly of the new ATX power supply. Remove power supply from case.

5. Install the new ATX power supply by sliding it into the position of the previous unit. Insert and tighten the rear case screws with a screwdriver and reconnect all power supply cable connections.

6. Restore power cable to the computer and power up the system.

Tips & Warnings

• Buy a power supply that can handle the load of the computer system.
• Buy an identical brand ATX power supply as the old unit to ensure all connections are the same.
• Wear a static strap to avoid transfer of damaging static electricity.