MSI GTX 580 Lightning PSU

I have a Zalman 1000HP power supply. It comes with 2 x 6+2 pin connectors and 2 x 6 pin connectors.
I plan on purchasing 2 x MSI GTX 580 Lightning GPUs.
They have 2 x 8 pin connectors, but they also come with a 6 pin to 8 pin adapter.
Am I going to have any noticeable reduction in performance or stability, or should I be fine using the adapters?
2 answers Last reply
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  1. Your psu has the proper pcie connectors.
    What's the problem.
    Use one 6+2 and a 6pin for each card.
  2. I have been wondering if my XFX - XXX 650 watt PSU could handle a single MSI GTX 580 Lightning. I've read that all I need is a 600 watt PSU in one article and read that the minimum is 700 watts in another article, which is true? I don't plan on overclocking the 580 Lightning until the card starts to have trouble (below 60 fps) with newer games.

    Here is the rest of my system if it will help :

    Gigabyte 890FXA-UD5 AMD based motherboard
    AMD Phenom II 1100T Thuban
    G.Skill RipJawz 4gb DDR3 RAM @ 1600
    Western Digital Caviar Black 500gb sata3
    Western Digital Caviar Black 320gb sata(1?)
    ASUS DVD Optical Drive
    Cooler Master HAF-932 with 3 200mm fans + 120 mm fan.
    BFG 9800 GT Eco Intelligence Edition

    (future, summer upgrades)

    1 OCZ Vertex 3 240gb
    Noctua NH-D14

    (just incase I'm cutting it close, I'd like to know if I should upgrade to a 750 watt or a 800 watt PSU)
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