What are Corsair iCue Dual-Rail vs Single-Rail OCP options

deskbound3

Member
The Corsair HXi Series PSU's offer an option in their iCue software. You can choose between Single-Rail OCP and Dual-Rail OCP.

HXi_iCUE_4.width-1000.format-webp.webp


What is the purpose of these options? It makes it sound like you can switch between single-rail and dual-rail on-the-fly, but that can't be right. Maybe @jonnyGURU could provide insight? I'm puzzled because if Multi-rail changes the output of the connections, how do I know which connection is on which rail?

Here is the label on my 2025 HX1200i, indicating it's a single-rail unit:
Corsair HX1200i.jpg

Some single-rail vs multi-rail reading material from jonnyguru: https://web.archive.org/web/20120111222017/http://www.jonnyguru.com/forums/showthread.php?t=3990
 
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