ATX Version 3.0 — PCI Express add-in card connectors

Scope and location

Identifies legacy 2x3 and 2x4 PCIe auxiliary-power forms and the 12VHPWR form with twelve larger power contacts plus four smaller sideband contacts.

PCIe auxiliary power connector section

Open the original source

Inspected

2026-10-05

Access

public page

Recorded AI-assisted source inspection; not independent human approval or hardware testing.

Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.

Source inspection is separate from independent technical approval, rights clearance and hardware testing.