StarTech.com MICATXPOW255 Instruction Manual Download Page 4

Introduction

Thank you for buying a StarTech.com 255-Watt replacement power supply. This Micro
ATX power supply is especially geared to fit space-confined systems and is guaranteed
compatible with Intel Pentium and AMD processors. This power supply ensures stable
system performance and uses a high air-flow fan to maintain an optimal operating
environment for heat-sensitive components. This power supply comes SATA ready with
a Serial ATA connector.

Features

• Compatible with Intel Pentium II, III, and 4, and AMD K6 and Athlon processors

• Ensures stable system performance

• Uses high air-flow fan for efficient cooling

• Uses high-quality connectors to provide minimal resistance and enhanced electrical 

conductivity

• Uses quad-protection: Short Circuit protection, Over Power protection, Over Voltage 

protection, and No Load protection

• Complies with ATX version 2.03, ATX12V, and Serial ATA 1.0 specifications

• Backed by StarTech.com’s two-year warranty

WARNING!

Computer parts can be severely damaged by static electricity. Be sure that

you are properly grounded before opening your computer case. StarTech.com
recommends that you wear an anti-static strap when installing any computer
component. If an anti-static strap is unavailable, discharge yourself of any static
electricity build-up by touching a large grounded metal surface (such as the computer
case) for several seconds. Also make sure that your computer is turned off and
unplugged before attempting to open your computer case.

Contents

This package should contain:

• 1 x MICATXPOW255 power supply

• 1 x power cord

2

Installation

NOTE

: Check the power supply voltage before installation. It should be the same as

your local power voltage (115V for North America and 230V for most of the European
countries). Change the voltage setting if necessary.

1. Make sure that your system is turned off and unplugged. Disconnect the power cord 

from your old power supply.

2. Open the case (consult your computer’s user guide for details, if necessary).

NOTE

: Before completing the next step, you may want to take note of what devices are

attached to your current power supply so you know which devices need to be connected
to the new power supply and where their connectors are located.

3. Disconnect all power connectors from the mother board and the peripheral 

devices such as hard drives, floppy disks, etc. Make sure that there are no devices 
connected to your existing power supply.

4. Remove the existing power supply from your computer case and replace it with the 

new StarTech.com power supply.

5. Connect the power connectors to your motherboard and peripheral devices.

6. Close your computer case.

7. Connect the power cord to the StarTech.com power supply.

MICATXPOW255 Connectors

3

+3.3V
+3.3V
+3.3V

Ground
Ground
Ground

+5.0V
+5.0V
+5.0V

Ground

Reserved

Ground

+12V
+12V
+12V

Pin 1

Pin 15

Serial ATA

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