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Wattage

How many watts would be needed to run 2 XFX Black 5970 4b http://www.newegg.com/Product/Product.aspx?Item=N82E16814150500 or 3 Sapphire 5870 2gb(925Mhz)...... http://www.newegg.com/Product/Product.aspx?Item=N82E16814103121 .Just wanted to be sure before I made the purchase.
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  1. A single 5970 can draw ~300 watts when running Furmark.
    Your config. says that you have a 1200 watt PCP&C, shouldn't have anything to worry about.
  2. delluser1 said:
    A single 5970 can draw ~300 watts when running Furmark.
    Your config. says that you have a 1200 watt PCP&C, shouldn't have anything to worry about.

    sorry I forgot to mention that it is for a different build
  3. Best answer
    A single HD 5970 can consume almost 360w of power when stressed to the limit as the following OCCT test shows:




    However, when playing a Crysis Warhead, power consumption is at a more manageable 241w for a single HD 5970. Of course if it is overclocked, then the HD 5970 would consume more power.




    Source
    http://www.xbitlabs.com/articles/video/display/gpu-power-consumption-2010_3.html#sect0


    For simplicity sake, let's just say that two HD 5970 will consume 482w total. But actual consumption should be less since SLI and XFire technology is not 100% performance efficient. Meaning adding another card will not automatically double your performance.

    Based on the above info, I will agree with ct615 that you should get a 750w+ PSU. I prefer Seasonic since they are basically the premier PSU manufacturer. But you can also choose from PC Power & Cooling, Corsair, Antec or XFX all of whom have their PSU built for them by Seasonic.
  4. Best answer selected by seanny.
  5. jaguarskx said:
    A single HD 5970 can consume almost 360w of power when stressed to the limit as the following OCCT test shows:

    http://www.xbitlabs.com/images/video/gpu-power-consumption-2010/occt_power.png


    However, when playing a Crysis Warhead, power consumption is at a more manageable 241w for a single HD 5970. Of course if it is overclocked, then the HD 5970 would consume more power.

    http://www.xbitlabs.com/images/video/gpu-power-consumption-2010/crysis_power.png


    Source
    http://www.xbitlabs.com/articles/video/display/gpu-power-consumption-2010_3.html#sect0


    For simplicity sake, let's just say that two HD 5970 will consume 482w total. But actual consumption should be less since SLI and XFire technology is not 100% performance efficient. Meaning adding another card will not automatically double your performance.

    Based on the above info, I will agree with ct615 that you should get a 750w+ PSU. I prefer Seasonic since they are basically the premier PSU manufacturer. But you can also choose from PC Power & Cooling, Corsair, Antec or XFX all of whom have their PSU built for them by Seasonic.

    so a 1,000 watt silverstone DA 1000 would be enough to run 2-XFX 5970 4Gb??
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