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GPU power requirement - Please Help

Discussion in 'Hardware' started by andrew151, Jul 29, 2010.

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  1. andrew151

    andrew151 Thread Starter

    Jul 29, 2010
    Hi everybody,

    For the last several days, I've been doing a lot of research about whether my power supply can support my graphics card, but I can't seem to find a definate answer. What I have is a 450 watt power supply; it has one single 12v rail that provides 24 amps. My graphics card is a ATI Radeon X1950 Pro PCI-E. It requires a 450 watt power supply and recommends 30 amps on the 12v rail.

    When I asked whether my PSU can support my graphics card on other forums, some people tell me it can, but others tell me it can't, so I'm really confused right now. I had my X1950 hooked up and running for 3 days without having any problem, but I took it out today, just to be safe until I can get a definate answer. Although I do notice that my power supply runs cooler without the X1950 hooked up.

    But on other forums, I even heard people run this card on a 18 amp 12v rail without any problem and they even have it running on a fully loaded system with 2x HDD, 2x DVD Drive, cooling system, fans and lights. And many people say that 22 amps should be the minimum to this card and 24 amps should be fine. However, there are also people who say that you should follow the manufacturers recommendation and get a minimum 30 amps power supply.

    To give you a better idea of my system, here are the specs.
    Pentium 4 HT 524 Prescott 3.06 GHZ (84 watt)
    Motherboard: ATI RC410 ULI M1573
    2 stick of DDR2 Ram 1x 1GB and 1x 512MB
    1x Samsung Writemaster DVD RW
    1x SATA 250GB Western Digital HDD 7200 RPM
    1x PCI Modem

    And also
    Diablotek PHD series 450 - 450 Watt power supply
    ATI Radeon X1950 Pro PCI-E

    And Yes, I know my system is getting old and I should get it replaced soon. But for now, I dont have the cash and this thing will have to do for now.

    Andy help would be appreciated, thanks in advance.
  2. ZP-Apps


    Apr 26, 2010
    You could try this:
    1. Find a low watt power supply, with a 24 amp rail.
    2. Use the PSU as an external power source to power the GPU.
  3. dustyjay


    Jan 23, 2003
    First Name:
    I would go with something along these lines http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004 Using a low quality PSU is asking for trouble up to burning out your motherboard if the PSU happens to blow (which can happen more easily with low quality unit) Corsair is a good manufacturer. The PSU I linked to provides 41Amps on the 12Vdc rail which should provide you with plenty of power for your entire system.
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