[Power Supply] What is ATX 3.1?

ATX 3.1 is the latest power supply standard released by Intel in 2023, designed primarily to meet the power demands of high-performance graphics cards and next-generation PC devices. Compared to ATX 3.0, the core improvements of ATX 3.1 include enhanced power stability, higher efficiency, and full support for PCIe 5.0, optimized for the high load requirements of new-generation hardware.

One of the improvements in ATX 3.1 is the upgrade of the 12VHPWR (16-pin) interface, a high-power connector designed for PCIe 5.0 graphics cards that can directly deliver up to 600 watts of power. This interface ensures a more stable power supply to the graphics card, eliminating the need for multiple adapters and improving the ability to handle current fluctuations, reducing issues like voltage instability or system restarts caused by sudden power surges.

Additionally, ATX 3.1 includes stricter power efficiency standards and transient power demand management, ensuring that the power supply operates efficiently under high load and avoids overheating. For example, Intel has defined faster current response times in ATX 3.1, enabling the power supply to quickly adapt to the power fluctuation demands of the graphics card and CPU in different usage scenarios, further enhancing the system's overall stability.

If you see the "ATX 3.1 Ready" label on the MSI official website product page, it means that the power supply meets the ATX 3.1 standard.