The Seasonic PRIME PX ATX 3.1 Series is built on top of all the great features of PRIME PX platform with added ATX 3.1 and PCIe 5.1 compatibility. Currently the 1600 W is equipped with native 12V-2×6 connectors and Digital Fan Control, and 105°C-rated Japanese electrolytic capacitors guarantee unwavering power delivery and long-term durability. All these qualities make this power supply perfect to welcome the newest high power graphic cards and processors on the market.

The Seasonic PRIME ATX 3.0 Series power supplies were initially shipped with 12VHPWR cables. Following the update to the ATX 3.1 standard, we began replacing these with the new 12V-2×6 connectors.

During this transition period, customers may receive either 12VHPWR or 12V-2×6 cables in the box. We apologize for any inconvenience this may cause. Please note that availability may vary by region. Here is the planned schedule for the new version availability:

• China: Available
• Europe: During Q1 2025
• North America: During Q1 2025

For difference between ATX 3.0 and ATX 3.1, you can refer to our FAQ: Differences Between ATX 3.0 and ATX 3.1 Standards