Are All ATX Power Supplies Uniform in Size- A Comprehensive Comparison

Are all ATX power supplies the same size?

When it comes to computer components, the ATX power supply is one of the most crucial yet often overlooked parts. Many people assume that all ATX power supplies are the same size, but is this really the case? In this article, we will explore the variations in ATX power supply sizes and help you understand whether all of them are indeed the same size.

Understanding ATX Power Supplies

First, let’s clarify what an ATX power supply is. An ATX power supply is a type of power supply unit (PSU) that is commonly used in desktop computers. The “ATX” stands for Advanced Technology Extended, which is a computer power supply design specification developed by Intel in 1995. This specification has since become the standard for desktop computer power supplies.

Standard ATX Size

The standard ATX power supply size is 150mm x 86mm x 140mm (W x H x D). This size is often referred to as the “ATX form factor.” Power supplies that adhere to this form factor are designed to fit into standard ATX cases without any issues.

ATX12V and EPS Power Supplies

While the standard ATX size is 150mm x 86mm x 140mm, there are also other form factors that are slightly different. For example, the ATX12V and EPS (Electrical Power Supply) specifications are also based on the ATX form factor but have slightly different dimensions. The ATX12V specification has a height of 86mm, while the EPS specification has a height of 100mm.

Mini-ATX and Micro-ATX Power Supplies

In addition to the standard ATX size, there are also smaller form factors such as Mini-ATX and Micro-ATX. These smaller power supplies are designed to fit into cases that are designed for these smaller motherboards. Mini-ATX power supplies typically have dimensions of 125mm x 63mm x 100mm, while Micro-ATX power supplies have dimensions of 100mm x 140mm x 63mm.

Conclusion

In conclusion, while the standard ATX power supply size is 150mm x 86mm x 140mm, there are variations in size and form factor for different specifications and motherboard sizes. Therefore, it is not accurate to say that all ATX power supplies are the same size. When choosing a power supply for your computer, it is essential to consider the specific form factor and size requirements of your case and motherboard to ensure compatibility.