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Will I have enough current with this single 12v rail PSU?

post #1 of 10
Thread Starter 
Hey guys. My sig rig "Folding Rig In Training" all the sudden starting screen freezing and spontaneous shutdowns on a stable overclock in the past couple weeks. I tried redoing my overclock from fresh with the same issue. Now I have all stock clocks and am still receiving the same issues. I just got my MSI GTX560 Ti 448 video card maybe a month ago and I am wondering with the combination of my oc'd FX-8120 and the GTX560 Ti that I probably don't have enough watts and current from my psu. After some research I did a psu calculator and it suggest I need like 650w and recommended 720w. I also found that the gpu requires 38A and my cpu needs 26.5A telling me that I need at least 64.5A on a single 12v rail. I recently checked and my current sig psu says I have 15A per rail and 700w power overall if I remember right.

1. Is my conclusion right that my current psu is being overtaxed by my upgraded system?

2a. Is this a good replacement Corsair Enthusiast Series TX 750 Watt ATX/EPS Modular 80 PLUS Bronze (TX750M) for my sig rig?

2b. This psu is 60A on a single 12v rail and by my newbie calculations I need 64.5A. Is this psu still meeting the recommended specs or is it any difference than what I am using now?

3. I also am an occasional folder and cruncher on special events which is also for those few days a month I am at 100% system load. Is there anything else I need to look at when looking for a psu replacement?

Thanks in advance for any help and advice.
post #2 of 10
if I remember this correctly

the 750 watt should provide 62 amps
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post #3 of 10
Quote:
Originally Posted by aas88keyz View Post

Hey guys. My sig rig "Folding Rig In Training" all the sudden starting screen freezing and spontaneous shutdowns on a stable overclock in the past couple weeks. I tried redoing my overclock from fresh with the same issue. Now I have all stock clocks and am still receiving the same issues. I just got my MSI GTX560 Ti 448 video card maybe a month ago and I am wondering with the combination of my oc'd FX-8120 and the GTX560 Ti that I probably don't have enough watts and current from my psu. After some research I did a psu calculator and it suggest I need like 650w and recommended 720w. I also found that the gpu requires 38A and my cpu needs 26.5A telling me that I need at least 64.5A on a single 12v rail. I recently checked and my current sig psu says I have 15A per rail and 700w power overall if I remember right.

1. Is my conclusion right that my current psu is being overtaxed by my upgraded system?

2a. Is this a good replacement Corsair Enthusiast Series TX 750 Watt ATX/EPS Modular 80 PLUS Bronze (TX750M) for my sig rig?

2b. This psu is 60A on a single 12v rail and by my newbie calculations I need 64.5A. Is this psu still meeting the recommended specs or is it any difference than what I am using now?

3. I also am an occasional folder and cruncher on special events which is also for those few days a month I am at 100% system load. Is there anything else I need to look at when looking for a psu replacement?

Thanks in advance for any help and advice.

Your GPU does not require 38A.... that would mean it's a 456w GPU and that's not correct. That GPU needs something like 210w.
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post #4 of 10
Thread Starter 
Ahh ok. I just got the current specs from another OCN thread for the GTX 560 Ti 448 club. Anyone know what the real current requirement is for this card? I also got the FX-8120 current from another thread so I don't necessarily have a solid resource for either. But I am right that 12v mult-rail 15A is not enough for what is connected and the way it is being used now on my current sig PSU, right? I got that info off the PSU itself.
post #5 of 10
Quote:
Originally Posted by aas88keyz View Post

Ahh ok. I just got the current specs from another OCN thread for the GTX 560 Ti 448 club. Anyone know what the real current requirement is for this card? I also got the FX-8120 current from another thread so I don't necessarily have a solid resource for either. But I am right that 12v mult-rail 15A is not enough for what is connected and the way it is being used now on my current sig PSU, right? I got that info off the PSU itself.


http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-560ti/specifications
Maximum Graphics Card Power (W): 210 W


Besides, two 6-pin PCIe + PCIe slot can only provide up to 225w total if specifications are followed.
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post #6 of 10
Either that TX-750 or OCZ ZT 750W, both provide 62A @ +12v and you could even go SLI with that. I got the cheaper OCZ ZS 750W and it still handles both my 3570k and gtx 570 overclocked to their limits.
post #7 of 10
Thread Starter 
So if I got this right my newbie calculations are:

FX-8120 (stock): 125W = 12v * 10.5A required (don't know what oc would come to
GTX 560 ti 448 : 210W = 12v * 17.5A

So a 12v single rail I would need 29 almost 30A for just those two. And the Corsair Enthusiast Series TX 750 Watt ATX/EPS Modular 80 PLUS Bronze (TX750M) at 12v single rail 60 or 62A would meet this requirement. And of course the psu calculator suggests 720w would be met by this PSU also.

How am I doing?
post #8 of 10
Thread Starter 
Quote:
Originally Posted by Kindredice View Post

Either that TX-750 or OCZ ZT 750W, both provide 62A @ +12v and you could even go SLI with that. I got the cheaper OCZ ZS 750W and it still handles both my 3570k and gtx 570 overclocked to their limits.

Thanks recommendation. I will check into the OCZ ZS 750W also.
post #9 of 10
Back when I was buying the ZS model was 25 bucks cheaper thats why I got this one, but right now I would go with the ZT 750, ZS model provides less power, +12V@54A vs 62A and it is not modular, which makes it much harder to manage those cables in the case.
post #10 of 10
Thread Starter 
Quote:
Originally Posted by Kindredice View Post

Back when I was buying the ZS model was 25 bucks cheaper thats why I got this one, but right now I would go with the ZT 750, ZS model provides less power, +12V@54A vs 62A and it is not modular, which makes it much harder to manage those cables in the case.

Whoops... I meant to say ZT and I looked it up as ZT but accidently called it an ZS. Don't know where that came from.
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