Power Supplies · Seasonic

Seasonic Vertex PX-1200 1200W

Seasonic Vertex PX-1200 1200W for local AI desktops and workstations that need clean stable power for a high draw GPU.

Seasonic Vertex PX-1200 1200W is a ATX PSU product from Seasonic built for desktop and workstation systems that run local AI workloads. It suits model loading, dataset handling and daily creation work where clean stable power for a high draw GPU matters in a home lab or office build.

Specifications

Name	Seasonic Vertex PX-1200 1200W
Brand	Seasonic
Category	Power Supplies
Type	ATX PSU
Power (TDP)	1200 W
Key spec	80 Plus Platinum
Key spec	ATX 3.1
Key spec	PCIe 5.1 12V-2x6 connector
Key spec	Fully modular
Key spec	Rated 1200W
Best for	GPU workstation; LLM inference; local AI build
Specs source	Seasonic product page
Last verified	2026-11-14