Atx Specification Pdf | !link!

The most common version referenced today is (released 2004) and ATX Version 3.0 (released 2022 for PCIe Gen 5). While 2.2 covers legacy systems, 3.0 is critical for modern GPUs.

The ATX specification defines several form factors to accommodate different system sizes. A standard ATX motherboard is designed with a primary focus on expansion and cooling. Motherboard form factor guide - Tech Talk∣SilverStone atx specification pdf

Before ATX, the industry used the AT (Advanced Technology) standard, which required messy physical switches for power and had confusing connector layouts. ATX introduced the "soft power" switch, standardized I/O panels, and the 20-pin (now 24-pin) main power connector. The most common version referenced today is (released