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Difference between these 2 power supplies

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  • Power Supplies
  • Power
  • PCI Express
  • Components
  • Product
Last response: in Components
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September 13, 2009 3:38:19 AM

http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Power supply A: SeaSonic SS-500ET Bronze 500W ATX12V v2.31 80 PLUS BRONZE Certified Active PFC Power Supply - OEM 83 dollars

http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Power supply B: SeaSonic SS-500ET 500W ATX12V V2.2 / EPS12V V2.91 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Power Supply - OEM 74.50 dollars

I did a bit of research and I found that the ATX12V V2.2 specification (power supply B) requires that power connectors that plug into the motherboard be of higher quality.

I couldn't find anything about ATX12V v2.31 (power supply A)

Which of those 2 power supplies is superior?

Here are my wild guesses:

I think power supply A (83 dollars) came from an earlier batch so the price is higher. Power supply B (74.50 dollars) came from a more recent patch after Seasonic found a way to reduce manufacturing costs (not by choosing lower quality parts I hope-again just wild speculation on my part).

Any info pertaining to the difference between those 2 power supplies would be appreciated.

Once I get this power supply I'll give my Antec Neopower 430 watts (32 amps on 12v rails or 384 watts on that 12v rail) to my brother.

He's running a GTS 250 that requires 2 pci-e power connectors on a Diablo 550w power supply (20 amps on 12v). This power supply has no pci-e connectors of its own, so we have to use one pci-e = 2X 4-pin adapters. Therefore we should need 4 x 4-pin power connectors to cover both pci-e power ports of the GTS 250.

However, the Diablo 550w only has 2 free 4-pin power connectors, so 1 x 4-pin power connector on the other side of each pci-e power port :ouch: 

More about : difference power supplies

a c 248 ) Power supply
September 13, 2009 4:28:15 AM

The revisions were part of the process of recommending and updating international design standards for atx and other power supplies. If you are technically inclinded and would like to read them, then here is a link to the revisions:

http://www.formfactors.org/developer%5Cspecs%5CPSU_DG_r...

That should keep you busy for a while! :) 


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Best solution

a b ) Power supply
September 13, 2009 5:08:51 AM

Xzar said:
I think power supply A (83 dollars) came from an earlier batch so the price is higher. Power supply B (74.50 dollars) came from a more recent patch after Seasonic found a way to reduce manufacturing costs (not by choosing lower quality parts I hope-again just wild speculation on my part).

The first costs more because it is a newer, more efficient version.
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