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I got one of these used and I can't get stability on even a modest mining rig. Right now I have a rig with a sempron, flash drive, a 5970 and two 5830. I was really hoping to get 5 gpu's stable with this power supply but now I'm beginning to think that may not be possible. Almost every time I plug anything into the same circuit as the power supply the system crashes. It was stable with the 750w rosewill so I know for sure its the power supply. So I guess what I'm asking is anyone using this power supply with good results should I try to get it RMA through rosewill or should i cut my losses and return it to the seller

I believe you may have a dud on your hands. I'm using a brand new one that I picked up a couple of weeks ago on new egg for $106 shipped/ and a free 1 year extended warantee. I'm running two 5850's overclocked to the max I could get them. It's a pretty nice psu for the $, and I plan to add 2 more 5850's to the system within a month. I would see about the rma before you accidently damage any of those precious gpus.

There's a thread (http://www.jonnyguru.com/forums/showthread.php?p=59265) about it on JonnyGuru forums. It's a Sirfa (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=132) unit.

Seems like it's more like a 900W power supply (as far as mining goes). The ripple numbers are horrid, so probably you're getting an out of spec spike when you plug in other stuff into your circuit.

This is why people say "Don't cheap out on your psu".

a SeaSonic 750 will probably out hump that ros1000.


The PSU is one of the the MOST important parts of the rigs....

I'm using two of them for over a year without any problems.

I seemed to find the problem and it wasn't the power supply after all. The only hardware change I had was the power supply so that's what I assumed it was. But actually It seems that voltage drops are causing problems with my switch or router, which is causing kernel panics in bamt. I reset my router and didn't setup static ip. Setup static ip and stable again, strangest thing ever, lol.

First time I heard router causing kernel panics... I would have thought network card drivers would be robust against this sort of thing.

We had a printer at work with a faulty NIC that was crashing our router/wifi hotspot. Took us over 2 days of spotty internet to diagnose as a random printer. Unplugged the printer and it's been fine for the past 6 months.

Any type of Rosewill products really turns me off. I've had several before with really bad experiences. Just keep in mind that Rosewill is a generic brand for newegg, so you won't exactly know who the OEM is unless you open up the item.

Yes, some can be bad, but by the same token some can be gems. I usually trust jonnyguru to come up with the truth when it comes to PSUs, and the one good Rosewill is the 1300 watt lighting unit. Still, nothing can beat a seasonic (except rebranded seasoncs lol).

Ya, it was a Rosewill router :P

This reminds me.. I have to RMA something.... had one of my silverstone 1200 go pop the other day.  (bought before I found SS).  

details:
miner8 not on.
wont boot
unplug psu, plug
wont boot
15 seconds later ................POP

glad I keep SS around, I had just got that deal from new egg, 4 SS 750's for 115 each.

Question: Has anyone actually had a seasonic die? This assumes that you are running them within the rated specs of course, not overdoing it. And if so, how old was it and what kind of load did it have?

the fans on mine are not even turning..  or they just come on for a few seconds once in a while...

they are rated to run 24/7 at 100%. 

my neighbor killed my 450 corsair (seasonic) after 4yrs and 8 months. But he was running 3 5770's a 5570 and burning a dvd on it, lol. they sent me a brand new one in the box with all accesorries

Which one do you guys think is better :

-Corsair AX1200 or

-Seasonic 1250W unit

I like them modular, single rail !

In that case, don't get that Seasonic.  It's actually a multi-rail unit.  (source (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=273))

I would look at Kingwin Lazer series (Gold / Platinum), Lepa G series, Rosewill Lightning or Capstone series, Sparkle Gold, or Antec High Current Pro.  While the AX1200 is no slouch, it is starting to show its age and is overpriced compared to the PSUs I recommended

Holy smokes. It does turn out you are RIGHT. I think D&T been spreading the FUD around that it is single rail.

Antec HCP-1200 is not fully modular :(

So it looks like I won't be selling them PSUs after all !

I cry bull shit..   SS  is a single rail according to these specs:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109&Tpk=SeaSonic%201250

The word 'SeaSonic' or 'Sea '  does NOT even appear anywhere on the page your referenced..  wtf?

"Ctrl+F Seasonic" gives:


If you read the whole article through there are numerous references to Seasonic as well. In fact, the word Seasonic is on every page of the review.

Ouch, I should not have capitalized the S   'SeaSonic'

So I stand corrected.  However, the SS does have a single rail.  Correct?

Same unit, different branding. Since it has only 4 rails instead of 6 or 8, you are less likely to actually run into problems using it. DeathAndTaxes uses them to power 4x 5970s with no hassle.

OK,  now i am confused.....


The SS has ONE rail.  Does anyone dispute this? .....   So how is it the 'same unit' if this unit has more then one rail?

The SS and the XFX are the same exact unit, save the brand name. They both have 4 rails.

I dispute that the SS only has one rail. When you have power supplies like this XFX model here, it is almost 99% certain that the OEM design is the same. Maybe several minor details are changed, like capacitor brand, or fan manufacturer. Not fundamental design changes like the number of rails.

Edit: I'm not sure that it's such a big deal though. There's 30A dedicated to a set of 4 PCI-E connectors and then another 45A dedicated to the other 4 PCI-E connector, so unless you were putting in graphics cards with 2x 8-pin PEG connectors, you couldn't exceed the rails anyways.

Interesting findings when actually trying to see what the number of rails are:

SeaSonic website: (doesn't say)
http://www.seasonicusa.com/NEW_X-series_1050-1250.htm


from new egg (single rail)
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109&Tpk=SeaSonic%201250


some BB site:  (quad rail)
http://www.overclock.net/t/1215732/seasonic-x-1250-vs-corsair-ax1200/10

Can't blame Newegg when the majority of folk would have determined it as a single rail too.  Also the TweakTown review that one guy listed in your OCN link is a bunch of bogus.  They don't have the proper equipment to stress the entire PSU and their "overviews" are lackluster to say the least.

The JohnnyGuru review is true.

Same unit different branding.

I did the research.

Seasonic 1250W unit is NOT single rail as some people spreading the FUDge around here are saying.

But still a good PSU for the money. Corsair is too expensive and not much better either.

Will someone please explain the FUD about single vs multi rail PSUs to me?! I have both, I run triple 5970s on Seasonic 1050s and quad 5970s on Antec HCP-1200s. Both have no issues. Someone please explain with actual proof to me that a quality single rail PSU is better than a quality multi rail PSU.

Quality being the key word here. Why miners choose to push power to expensive mining equipment with cheap crap is beyond me.

Having multiple rails to limit the max amps any one rail provides is actually part of the ATX spec. However, with multiple rails there is the possibility of overloading a rail even though the full power supply capacity isn't near capacity. Having a single rail is simpler for the user and cheaper to implement. A good multi-rail unit with well marked/connected cables has the potential to be more efficient/clean than a single rail under full load.

well I have used a silverstone 1200 watt with 4 rails and a thermaltake 1500 which I think has 6 rails and no problems. So multi rails are probably not a huge deal when they are 20-30 amps each. but the smaller ps where they are only 15 amps or so each I would stay away from