Seasonic M12D 850W Rail Configuration

[xhrrcollector]

I recently bought the Seasonic M12D 850W, but this PSU is a dual rail design and there is no label or manual telling me which output is connected to which rail. I tried to search on review and there is no indication which connector isl inked to which rail. Can someone let me know which PCI-E is connected to the first rail and which PCI-E is connected to second rail? Thanks in advance!

[bojangles]

Here you go. Straight from here.

Originally Posted by JonnyGURU

I promised an up close shot of the modular panel, and here it is. The rail distribution is a bit funky on this, but Seasonic was kind enough to enlighten me. From left to right in the above picture, the connectors are: 12V1, 12V1, 12V2, 12V2, 12V1, 12V2. This means that the PATA/SATA connectors are evenly divided between the two 12V rails, as are the PCI-E connectors. The hardwired cables are similarly divided - 12V2 for the EPS12V and ATX12V cables and one of the PCI-E cables, with everything else on 12V1.

[xhrrcollector]

Thanks! However for the hardwired cables, it says ONE of the PCI-E cables is on 12V2, do you know which one is on 12V2 and which one is on 12V1. I want to distribute the two PCI-E onto both rail.

[bojangles]

Could you tell us what your build is? I'm not sure which is which, but honestly it shouldn't matter too much if you're running a "usual" build with one GPU. This should help me out.

[_dangtx_]

maybe my memory's fuzzy, but didnt that psu behave as a one rail unit in the end? :)

[ilya]

Originally Posted by _dangtx_

maybe my memory's fuzzy, but didnt that psu behave as a one rail unit in the end? :)

It pretty much does, like most of the S12D/M12D lineup. All they really did was split a single rail unit into 2 rails and added 2 separate OCPs, one on each rail. In the end you get a single rail unit performance wise.

[_dangtx_]

thanks. ive used plenty in me builds, builds for people and didnt really run into rail splitting issues even with higher end cf/sli setups.

[xhrrcollector]

I'm running
i7 970 @ 4.0 ht off
gtx 480
1 5400 rpm hdd and 1 intel ssd
and about 8 fans

[bojangles]

With a setup like that you won't run into any issues at all. I would run your setup according to however well you can get your cabling to be :).

On a side note, I do believe I remember hearing the the M12D was actually single rail.