Seasonic PRIME PX-1000 (2019)

Seasonic introduced the PRIME PX-1000 in 2019 as part of its third‑generation PRIME family under the OneSeasonic refresh (PRIME PX series). It’s an ATX 12V, 80+ Platinum, fully modular 1000 W unit backed by a 12‑year warranty.

Positioned as a flagship PSU, it exists to deliver clean, reliable power with ample headroom for demanding desktops. It’s well‑suited to high‑end GPU builds and users planning overclocking or many drives; the 170 mm ATX length fits most mid/full‑towers, and the hybrid fanless mode helps keep noise low. Note that this 1000 W PX variant is pre‑ATX 3.0 and lacks a native 12VHPWR connector. The PRIME PX line is now listed by Seasonic as discontinued.