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Corsair AX1200 single rail worries

post #1 of 39
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Ok, So im looking at getting the Corsair AX1200 but am concered about the single rail on the 12v. I am literally caught in the middle. I am going to be using it in extreme OC session with multi GPU setups running L2n and DICE, reaching 6.5GHz + on my 965. Now i am concered that a multi rail PSU, giving 30A per a rail will not be able to give me best results for an OC but at the same time having OCP helps in a serious situation. I am going to be spending a small fortune ona PSU and want the absolute best for it, i do unfortunatly need a fully 100% modular PSU due to a mod so i am limited with that. Do you think the AX1200 is a good choice to go for. I know the Antec 1200's(quattro and hcp) are obviouse choices but neither are 100% modular, which is a feature i need.

Just want the peace of mind.

Thanks
   
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post #2 of 39
The AX1200 is a complete sidegrade from the Antec 1200w PSU. In fact, the Antec 1200w was run at the level of a 1700w PSU and held perfectly fine.
     
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post #3 of 39
It's a quality power supply.

But it is an example of the point where single rail becomes dangerous. When [H]ardOCP was testing the AX1200 there was a parasitic short circuit in their equipment. The AX1200 pumped nearly 100A of current through equipment not designed for that load. It fried their Chroma ATE and oscilloscope before the PSU itself fried. A few thousand dollars worth of damage.


The PSU did not CAUSE the problem. It just didn't have the protection (OCP) that would have stopped the problem before it got worse. The odds of you having that type of short circuit are very low. It's not worth losing sleep over.

But I do want to see multi rail OCP made standard.
post #4 of 39
Did [H]ardOCP mention this in the review? I don't remember them putting that information in but then again I don't always remember yesterday.
 
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post #5 of 39
Quote:
Originally Posted by mdatmo View Post
Did [H]ardOCP mention this in the review? I don't remember them putting that information in but then again I don't always remember yesterday.
Yup.

Quote:
What also made me wince a bit was that yes, our first sample of the AX1200 had an unfortunate issue during load testing. For some reason the unit when connected to our load tester at full load provided more power than it was programmed to on certain connectors, and more power than a pair of 12v load banks could withstand, and the load tester was damaged. I hate to break it to you folks, but that stuff happens sometimes and happens with the best of brands, but more often with the worst.
post #6 of 39
Quote:
Originally Posted by SystemTech View Post
Ok, So im looking at getting the Corsair AX1200 but am concered about the single rail on the 12v. I am literally caught in the middle. I am going to be using it in extreme OC session with multi GPU setups running L2n and DICE, reaching 6.5GHz + on my 965. Now i am concered that a multi rail PSU, giving 30A per a rail will not be able to give me best results for an OC but at the same time having OCP helps in a serious situation. I am going to be spending a small fortune ona PSU and want the absolute best for it, i do unfortunatly need a fully 100% modular PSU due to a mod so i am limited with that. Do you think the AX1200 is a good choice to go for. I know the Antec 1200's(quattro and hcp) are obviouse choices but neither are 100% modular, which is a feature i need.

Just want the peace of mind.

Thanks
I don't understand why 30a per rail won't give you the best results for an OC? How much wattage does a mobo and CPU running a 965 @ 6.5 take? You're in very much uncharted territory for me at least. I think this question should be best directed toward a world class oc'er. But I can't see a CPU, RAM and mainboard consuming 360w when the TDP is like 130w.

That said, I cannot see a Corsair PSU being less efficient or of lower quality than an Antec one.
Edited by jadawgis732 - 2/20/11 at 1:23pm
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post #7 of 39
So would a 1000w+ 6-8 rail PSU be better than a single rail 1000w+ PSU?
     
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post #8 of 39
Quote:
Originally Posted by jadawgis732 View Post

That said, I cannot see a Corsair PSU being less efficient or of lower quality than an Antec one.
Why? Because it says "Corsair" on it? There are many Antec units that are far superior to some Corsair units.

Quote:
Originally Posted by DorkSterr View Post
So would a 1000w+ 6-8 rail PSU be better than a single rail 1000w+ PSU?
Yes, purely for safety reasons. Electrical performance between single and multi rail wouldn't change.
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post #9 of 39
Quote:
Originally Posted by jadawgis732 View Post
I don't understand why 30a per rail won't give you the best results for an OC? How much wattage does a mobo and CPU running a 965 @ 6.5 take? You're in very much uncharted territory for me at least. I think this question should be best directed toward a world class oc'er. But I can't see a CPU, RAM and mainboard consuming 360w when the TDP is like 130w.

That said, I cannot see a Corsair PSU being less efficient or of lower quality than an Antec one.
a 130w TDP CPU can pull over 200 watts at 6.5+ GHZ. easily.
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post #10 of 39
I"m a huge fan of single rails... PC Power & Cooling use it and they're the best....YEAH. I can't wait to scrap mine and buy the Corsair 1200W.

BTW.. my Corsair 750W powered my i7 920@ 4.4GHz and two GTX295's in quad-SLI also OC'd.... 25/7 stable in every burn/benchmark... single rail= win.
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