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Zalman ZM850-HP power supply Help ?

Discussion in 'General Hardware' started by heavyunit, Jul 10, 2012.

  1. heavyunit New Member

    Jul 10, 2012
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    Hello Tech Power Up Forum, I just upgraded my graphics card to EVGA 025-P3-1579-AR GeForce GTX 570 HD , So my question is what is the best way to supply power using both rails on what cables so that I get the most amperage flowing to the graphics card ? I dont know how the six pin power cables are wired to the rails of the power supply so that I dont stress one rail. I would like to make it even draw using both rails , I only have one graphics card. The power supply is Zalman ZM850-HP, Thank You very much for your help.
  2. Law-II


    May 9, 2011
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    Mainland Britain

    EVGA recommend this - Requirements
    Minimum of a 550 power supply.
    (Minimum recommended power supply with +12 Volt current rating of 38 Amps.)

    Source - http://www.evga.com/products/moreInfo.asp?pn=025-P3-1579-AR&family=GeForce 500 Series Family&sw

    Zalman ZM850-HP supplies 18Amps on six 12V rails

    Source - http://www.techpowerup.com/reviews/Zalman/ZM850-HP/5.html

    Use the two 6+2 pin connectors that are attached to the PSU "[TPU] two PCI-E video card connectors and a few peripheral cables are fixed to the PSU which means there won't be any losses in power quality"

    Edit: mentioned by Kenshai - Update VGA card draws up to 75w of power from the PCIe slot x16 Slot that is rated at 3.3 volt [25Amps] math - 75w/3.3v = 22.73A

    Edit: General PSU Info http://www.techpowerup.com/forums/showthread.php?t=39758

    atb (all the best)

    Last edited: Jul 10, 2012
  3. Kenshai

    Mar 2, 2008
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    Raleigh, North Carolina
    I'm willing to bet that most if not all of the PCI-E connectors will be on separate rails . So in reality it shouldn't matter which one you plug them into.

    Law - Something you're not taking into account is also that the socket provides power and that the card perhaps may have access to more than two rails of power.
    Law-II says thanks.

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