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Seasonic Platinum-860 design question - Page 4

post #31 of 34
Quote:
Originally Posted by shilka View Post

Strange that the 860 is multi rail when all others are single???

P860/1000 and X1050/1250 are multi-rail.

Here's another mentioning of them being multi-rail by Tator Tot: http://www.jonnyguru.com/forums/showpost.php?p=92999&postcount=5
post #32 of 34
Quote:
Originally Posted by qwan456 View Post

P860/1000 and X1050/1250 are multi-rail.

Here's another mentioning of them being multi-rail by Tator Tot: http://www.jonnyguru.com/forums/showpost.php?p=92999&postcount=5

???

If they are multi rail how come Jonnyguru onlt show one 12v rail in his tests

Thought they where all single rail
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post #33 of 34
Quote:
Originally Posted by shilka View Post

???

If they are multi rail how come Jonnyguru onlt show one 12v rail in his tests

Thought they where all single rail

Well, if you look at review on the XFX 1250w version I had linked to, Jonny didn't pay attention to how he plugged it in, which can cause him to unintentionally trip the OCP and he did. Due to the high OCP trip point and some luck in plugging it in, it may have been overlooked that it was a multi rail design with the load patterns that Wolf had tested it at.

SITI PS232F has been used in the XFX ProSeries 1250w model, SS-860XP as shown at Anandtech, and SS-1000XP as shown in the review at RealHardTechX which has support for OCP support for four +12v rails. You could also see multiple of 12v sources and ground on them.
Edited by qwan456 - 11/12/13 at 7:29am
post #34 of 34
Quote:
Originally Posted by shilka View Post

Its single rail not multi rail

The one I have, which has identical internals to any other 860 I've seen in reviews is definitely mutli-rail.
Quote:
Originally Posted by shilka View Post

Strange that the 860 is multi rail when all others are single???

The 1000 is multi-rail as well.
Quote:
Originally Posted by shilka View Post

If they are multi rail how come Jonnyguru onlt show one 12v rail in his tests

He made a mistake.
Quote:
Originally Posted by qwan456 View Post

didn't pay attention to how he plugged it in, which can cause him to unintentionally trip the OCP and he did.

This is what I did as well, and how I initially came to the conclusion it was multi-rail.

4.4GHz 3930k and two OCed 7950 with powertune disabled, with the GPUs powered by only two PSU plugs total (evidently on the same rail as the EPS +12v). I ran AVX Prime95 Large FFTs and OCCT 3.1.0 at maximum shader complexity at the same time. Instant restart.

Dropped CPU to stock. Same everything else. No issues, no restart.

Restored CPU OC (which was 24 hour stable on it's own), and gave more voltage to everything to rule out unstable uncore/SA with the added PCI-E load. Same instant restart as before when starting OCCT while Prime95 was running.

Opened up system, installed two more PCI-E power cables, so every 6-pin on both of my GPUs had it's own PSU connector. Restored OC to the original parameters I was using in first test. Attempted tests again. Runs indefinitely; no issues, no errors, no restarts.

Pretty clear case of OCP being tripped on a multirail PSU. Was confused at first because the manual makes no mention of additional rails, but there is an ambiguous reference to "combined +12v" current.

A look at the internals of the PSU and an internet search doubly confirm the conclusion I reached from the OCP behavior. It has to be multi-rail.
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