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Can my PSU run a GTX 580 card? - Page 2

post #11 of 15
Thread Starter 
Quote:
Originally Posted by Schmuckley View Post

I see your psu has 4 split rails..2 are 18a and 2 are 30a..so I'm going to say no..A gtx 580 will most likely trigger the OCP.

Yeah, I saw that, however I saw something else too that confused me:

12v1 & +12v2 & +12v3 & +12v4 < 768W (64A)

Does that mean that My PSU is a 64A one???
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post #12 of 15
Quote:
Originally Posted by Arxontas View Post

Yeah, I saw that, however I saw something else too that confused me:
12v1 & +12v2 & +12v3 & +12v4 < 768W (64A)
Does that mean that My PSU is a 64A one???

That is correct. You don't add up the rated amperage from each rail... you take the number below all the 12v rails (combined max wattage) and you divide that number by 12. In this case 768 / 12 = 64A

On a dual rail power supply that is 12V1=20A, 12V2=20A.. This does not mean you have 40A of power available on the 12V. Always take that combined 12V rail wattage and divide it by 12.
Edited by Jayjr1105 - 4/4/12 at 6:06am
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post #13 of 15
Thread Starter 
Quote:
Originally Posted by Jayjr1105 View Post

That is correct. You don't add up the rated amperage from each rail... you take the number below all the 12v rails (combined max wattage) and you divide that number by 12. In this case 768 / 12 = 64A
On a dual rail power supply that is 12V1=20A, 12V2=20A.. This does not mean you have 40A of power available on the 12V. Always take that combined 12V rail wattage and divide it by 12.

Thanks for the explanation, Jay. So, do you think that my PSU can take the load after all?
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post #14 of 15
Quote:
Originally Posted by Schmuckley View Post

I see your psu has 4 split rails..2 are 18a and 2 are 30a..so I'm going to say no..A gtx 580 will most likely trigger the OCP.

18A * 12V = 216W
30A * 12V = 360W
You seriously mean a GTX 580 which pulls about 220W at load from the 6-pin, 8-pin and the PCIe-connector will trigger the OCP?
Do you really think Hiper was dumb enough to put every PCIe-connector, the 8-pin CPU and the 24-pin mobo-connector on a single 18A-rail leaving the other three rails for HDDs?

According to it's specs, that PSU will do completely fine with two GTX 580s on a heavily overclocked FX-8150. There's no way you'll have problems with a single 580 provided you don't connect everything to one rail.
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post #15 of 15
Quote:
Originally Posted by Arni90 View Post

18A * 12V = 216W
30A * 12V = 360W
You seriously mean a GTX 580 which pulls about 220W at load from the 6-pin, 8-pin and the PCIe-connector will trigger the OCP?
Do you really think Hiper was dumb enough to put every PCIe-connector, the 8-pin CPU and the 24-pin mobo-connector on a single 18A-rail leaving the other three rails for HDDs?
According to it's specs, that PSU will do completely fine with two GTX 580s on a heavily overclocked FX-8150. There's no way you'll have problems with a single 580 provided you don't connect everything to one rail.

^ This. You will be perfectly fine. The only concern I had in the beginning was if your PSU was as old as the rest of the system which may have warranted an upgrade. But since you clarified it is less than a year old then you are g2g.
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