Motherboard atx detail

Close-up details of an ATX motherboard, highlighting components such as slots, capacitors, and power connectors.

About this subject

The ATX (Advanced Technology eXtended) motherboard is a standard introduced by Intel in 1995 to replace the older AT form factor. It defines dimensions of 305 mm x 244 mm, allowing more space for connectors and airflow. This format became dominant in desktop computers due to its flexibility and efficiency.

Key visible components include the CPU socket, RAM slots (DIMMs), PCIe expansion slots, chipset, capacitors, and power connectors. Electrolytic and solid-state capacitors filter electrical current ensuring stability. Internal SATA and USB connectors allow connecting hard drives and peripherals.

ATX introduced the 20-pin (later 24-pin) power connector and enabled software-based power management. Over time, variants like Micro-ATX and Mini-ITX emerged for compact devices while maintaining electrical compatibility.

Interestingly, modern motherboards use polymer solid capacitors, more durable than traditional electrolytic ones. Component layout follows strict standards to minimize electromagnetic interference.

Frequently Asked Questions

What does ATX stand for?

ATX stands for Advanced Technology eXtended, a motherboard standard introduced by Intel in 1995 to replace the AT form factor.

What are the standard dimensions of an ATX motherboard?

A standard ATX motherboard measures 305 mm by 244 mm, approximately 12 x 9.6 inches.

What is the difference between electrolytic and solid-state capacitors on a motherboard?

Electrolytic capacitors use a liquid electrolyte, while solid-state capacitors use conductive polymer, making them more durable and less prone to leakage or failure.