View Full Version : Seasonic M12 power distribution

01-08-2007, 11:15 AM
Hi everyone,
I was looking for a power distribution scheme of the two 12v rails among the modular cables.
I've been searching for a while through forums and reviews, but couldn't find anything specific.
What i would like to know most is what CPU-8pin and the PCIe are attached to: 8pin->12v1 and both PCIe->12v2? Or does one of the PCIe connectors share the 12v line with the cpu? If yes, wich one?

Thanks in advance and sorry for any grammar error, i'm Italian :)

01-08-2007, 11:34 AM

01-08-2007, 12:15 PM
Ahem...am i dumb or there's not what i need?

I'll be clearer:


Tick the right one :p

Oklahoma Wolf
01-08-2007, 12:19 PM
The M12 is internally a single 12v unit - doesn't matter which you check, it's all on the same 12v rail ;)

01-08-2007, 12:22 PM
Well.. I'm not going to call anyone dumb, but.....

From that page:

Now on the previous page, you saw that Seasonic advertises this PSU as having four 12V rails. You'll notice in these load tests that I only specify a load on 12V1 and 12V2. This is because I could not find any proof that this PSU had more than two 12V rails; at the most three. And I found that even if there were three 12V rails, there is no OCP (over-current protection) or any circuitry in place that disrupts continuity between the multiple "rails." We'll discuss this further during the autopsy.

Ok.. So let's go to the next page and discuss the autopsy...

The whole bottom half of the next page answers your question in spades.