APS400GB specification sheet

About this product

The Astrum PS400S 300W ATX Power Supply is a practical power solution for office desktops, budget PC builds and replacement upgrades, featuring a 24-pin ATX motherboard connector, EPS12V CPU power, 6-pin PCI-E, 3 x SATA and 2 x Molex connectors. Its 120mm fan provides quiet cooling, while OVP, OPP, OCP, OTP, SCP and UVP protection help safeguard connected components. Designed for 220V AC input and standard ATX PS2 systems, this 300W PSU is a suitable choice for everyday desktop computing. Buy the Astrum PS400S online today for a dependable desktop power upgrade.

Description

The Astrum PS400S is a 300W ATX PS2 power supply designed to provide power for compatible desktop computer systems. It is suited to office computers, budget home builds and replacement applications where a standard ATX power supply is required.

The PSU features a 24-pin ATX motherboard connector and an EPS12V CPU connector with an 8-pin or 4+4-pin configuration. A 6-pin PCI-E connector is provided for compatible discrete graphics hardware, while 3 x SATA and 2 x 4-pin Molex connectors support compatible storage devices and peripherals.

Cooling is provided by a 120mm silent fan designed to move air efficiently during normal desktop operation. The flat cable design can help keep internal wiring organised and reduce unnecessary cable obstruction inside a compatible computer case.

The Astrum PS400S incorporates OVP, OPP, OCP, OTP, SCP and UVP protection. These features provide protection against specified overvoltage, overpower, overcurrent, overtemperature, short-circuit and undervoltage conditions. The unit accepts 220V AC input and includes an integrated power switch.

With a compact 150 x 140 x 85mm chassis and 850g weight, the PS400S is designed for compatible ATX PS2 desktop installations. Its connector selection makes it suitable for a range of everyday desktop configurations within its 300W maximum power rating.

Features

The Astrum PS400S combines standard desktop connectivity, active cooling and multiple protection features in an ATX PS2 form factor.

• 300W maximum total power output for compatible desktop systems.
• ATX PS2 form factor for compatible desktop cases.
• 24-pin ATX motherboard connector.
• 1 x 8-pin / 4+4-pin EPS12V CPU connector.
• 1 x 6-pin PCI-E connector.
• 3 x SATA power connectors for compatible storage devices.
• 2 x 4-pin Molex connectors for compatible peripherals.
• 120mm silent cooling fan.
• Flat cable design for organised internal cable routing.
• OVP protection for overvoltage conditions.
• OPP protection for overpower conditions.
• OCP protection for overcurrent conditions.
• OTP protection for overtemperature conditions.
• SCP protection for short-circuit conditions.
• UVP protection for undervoltage conditions.
• 220V AC input.
• Integrated power switch.

Reliable Power for Your Desktop Build or Upgrade
The Astrum PS400S is a 300W ATX PS2 power supply built for South African mains voltage - designed for office desktop PCs, budget home builds, and replacement PSU upgrades. A complete connector set, 120mm silent fan, and 6-protection safety system make it a dependable choice for everyday computing.

Complete Connector Set
Everything your build needs in one PSU: 24-pin ATX for the motherboard, 8-pin / 4+4-pin EPS12V for the CPU, 6-pin PCI-E for a discrete GPU, 3 x SATA for storage drives, and 2 x 4-pin Molex for peripherals. Flat cable design helps keep your build tidy and airflow unobstructed.

6-Protection Safety System
OVP, OPP, OCP, OTP, SCP, and UVP protection work together to help shield your components from power faults, including overvoltage, overpower, overcurrent, overtemperature, short-circuit, and undervoltage issues. In South Africa's variable power environment, a protected PSU is not optional - it is essential.

120mm Silent Fan
The large 120mm fan moves air efficiently at lower RPM than smaller fans, helping keep the PS400S running quietly during normal desktop workloads. Effective thermal management supports extended daily use.

Built for South Africa
220V AC input is designed for South African mains supply. The ATX PS2 form factor fits standard ATX tower, mid-tower, and compatible microATX cases. A built-in power switch allows clean on/off control without unplugging the power cable.

What's in the Box

• 1 x Astrum PS400S 300W ATX Power Supply
• 1 x User Guide

Specifications

©2026 Respective owners and brand holders. This table has been carefully researched and generated by ComXpert International CC (//www.comx-computers.co.za), however, errors and omissions may occur. Only references to South Africa apply. All products are sourced in South Africa from the official suppliers and the warranty is that of the local supplier. E&OE. This table and our site's content may be used on condition that this notice and link remains intact and unaltered.
Specifications
Product Code	APS400GB
Model	PS400S
Total Power	300W Max
Form Factor	ATX PS2
AC Input	220V
Motherboard Connector	24-pin ATX
CPU Connector	1 x 8-pin / 4+4-pin EPS12V
PCI-E Connector	1 x 6-pin
SATA Connectors	3 x SATA
Molex Connectors	2 x 4-pin Molex
Cooling	120mm silent fan
Cable Type	Flat cable
Protection	OVP, OPP, OCP, OTP, SCP, UVP
Dimensions	150 x 140 x 85mm
Weight	850g

FAQ

What is the Astrum PS400S 300W ATX Power Supply used for?

The Astrum PS400S is designed for compatible desktop computers, including office PCs, budget home builds and replacement PSU applications.

How much power does the Astrum PS400S provide?

The Astrum PS400S provides a maximum total power output of 300W.

What motherboard connector does the Astrum PS400S use?

The PSU has a 24-pin ATX motherboard connector for compatible desktop systems.

Does the Astrum PS400S have a CPU power connector?

Yes. It includes 1 x 8-pin / 4+4-pin EPS12V CPU power connector.

Does the Astrum PS400S support PCI-E power?

Yes. The power supply includes 1 x 6-pin PCI-E connector for compatible hardware.

How many SATA connectors does the Astrum PS400S have?

The Astrum PS400S provides 3 x SATA power connectors.

Does the Astrum PS400S include Molex connectors?

Yes. It includes 2 x 4-pin Molex connectors for compatible peripherals.

What cooling system does the Astrum PS400S use?

The PSU uses a 120mm silent fan for cooling during normal desktop operation.

What protection features are included?

The Astrum PS400S includes OVP, OPP, OCP, OTP, SCP and UVP protection for specified overvoltage, overpower, overcurrent, overtemperature, short-circuit and undervoltage conditions.

What are the dimensions of the Astrum PS400S?

The power supply measures 150 x 140 x 85mm and weighs 850g.

What input voltage does the Astrum PS400S use?

The Astrum PS400S is specified for 220V AC input.