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how many rails does this psu have?


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#1 Stephen_D

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Posted 24 October 2013 - 01:01 AM

Ok so my psu is dying and I have a pretty decent machine. So as my search for a new psu is on going, one of my friend gave me an old orion p4-585 rev intel 2.2 psu. As stated on the label its marked 585watts max. Now here is my problem. If I break down the wattage per voltage, I cannot get close to 585 watts, so I was wondering maybe if the 12 volt line would be on 2 rails of the supposed 18A its supposed to give. So here is the break down:

3.3v @ 18A (59.4w)
+12v @ 18a (216w)
+5v @ 21a (105w)
+5vsb @ 2a (10w)
-12v @ .5a (6w)

So that gives 397 watts in total. So how can they say its a 585watts max? And if I would calculate it with 2 rails, it would be like if it could support theorectically 613 watts, with the max actually being 585 all rails combined watts.

Thanks

Btw specs:

Fx8350 8 cores @ (stock) 4 ghz
8gb ddr3 (2x 4gb gskill)
Radeon 7770 graphics
1 hhd no dvd drives

I would like to add soon a 6500 series graphic card for extra monitor support, 2 more sticks of ram, and maybe eventually a ssd

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#2 Roodo

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Posted 24 October 2013 - 12:59 PM

•Part Number:
- HP585D
•Form Factor:
- ATX12V
•Power Supply Wattage:
- 585W
•SLI/CrossFire Ready:
- No
•Modular:
- No
•Redundant:
- No
•12 Volt Rails:
- 1

#3 Stephen_D

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Posted 24 October 2013 - 04:46 PM

•Part Number:
- HP585D
•Form Factor:
- ATX12V
•Power Supply Wattage:
- 585W
•SLI/CrossFire Ready:
- No
•Modular:
- No
•Redundant:
- No
•12 Volt Rails:
- 1

Ummm, ok, but how can I have 585 watts if the total wattge of all the rails are barely 400 watts?



#4 Roodo

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Posted 24 October 2013 - 05:39 PM

I came up with about 442 w The supply is only rated at a little higher then 75% efficient
585 * .76 = 444 w

#5 Stephen_D

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Posted 24 October 2013 - 06:16 PM

I came up with about 442 w The supply is only rated at a little higher then 75% efficient
585 * .76 = 444 w

ok, so you are telling me that that 585 watts is with the power loss due to heat? I thought when it was marked at 585 watts, it did not include loss of energy.






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