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550W Powersupply. Do you combine current on each +12V rail

Hi everyone.

Im still a noob for PSU specs. I am bout to buy a GTX570 that needs 550W PSU. I saw a Huntkey 600W PSU with two 12V rails each with 18A. I think it has only one 6-Pin Connector.

A GTX570 needs 34A on a +12V Rail. I requires two 6pin connects. I am wondering if this PSU will be able to power it. Considering the fact that I will add a molex to 6pin for the 2nd 6pin slot.

Please Help me I am at cross road. Currently I have a 500W Premium PSU with 22A on its +12V rail. Do I need to upgrade or will the GPU work a low perfomance.
10 answers Last reply Best Answer
More about 550w powersupply combine current rail
  1. You'll need a new power supply unit. GTX 570 requires one 6-pin and one 8-pin power connector to work.
  2. The ones Im planning to buy from Inno3D or gigabyte require 2 spins. How the +12V current(A) works? I need help
  3. Best answer
    You cannot add them. The manufacturer of a power supply usually tells how much power it provides on both rails together. Total power would be something like full of one raid and half of another one.

    Though, I am sure gigabyte one requires 1 6-pin and one 8-pin connector:

    http://www.gigabyte.com/products/product-page.aspx?pid=3685#sp
  4. Best answer selected by Dumisani.
  5. Thanks. Actually I wanna know that given a 600W PSU with two +12V rails with 22A each. If you supply the GTX570 with two 6pin connectors. Will it be enough?
    Will the amount supplied to it be 44A.
  6. As I said, you cannot add them. Depends on the PSU. Does it have the two connectors natively (without any adapters?).
  7. one 6pin and a Molex Adaper
  8. Don't use it to power up a GTX 570. It calls for trouble.

    GTX 660 would be better choice for the power supply unit.
  9. Sunius said:
    Don't use it to power up a GTX 570. It calls for trouble.

    GTX 660 would be better choice for the power supply unit.


    Thanks a lot for your advice. One more thing what kind of a trouble. Will it damage my GTX570 or it will perform lesser
  10. It can damage the GTX 570. It can damage your motherboard. It can just burn out. It can cause fire, or even explode.

    Results of low quality power supply failure can be unexpectable.
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