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Wht is minimum Amp on +12 V rail required to run ATI Radeon HD6670 or 75w gpu

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  • Power Supplies
  • ATI
  • Graphics
  • GPUs
  • Graphics Cards
  • Radeon
Last response: in Graphics & Displays
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January 5, 2014 7:04:06 PM

Wht is minimum Amp on +12 V rail required to run ATI Radeon HD6670 or 75w gpu

More about : wht minimum amp rail required run ati radeon hd6670 75w gpu

a b ) Power supply
a b U Graphics card
January 5, 2014 7:18:15 PM

It is simply 75W divided by 12v or 6.25A
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a b ) Power supply
a b U Graphics card
January 5, 2014 7:33:54 PM

  • Not quite. You forgot about the CPU and some hard drives.
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    a b ) Power supply
    a b U Graphics card
    January 5, 2014 7:36:30 PM

    I was assuming he was asking about just the card since that is what the questions says.
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    January 5, 2014 7:43:58 PM

    giantbucket said:
  • Not quite. You forgot about the CPU and some hard drives.


  • Mr rig is
    AMD FX 4300
    2 HDD
    Radeon R7 250 1gb DDR5
    1 DVD RW Drive
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    January 5, 2014 7:47:04 PM

    can a 450w psu with 20A on 12v rail run it
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    a b ) Power supply
    a b U Graphics card
    January 5, 2014 8:50:59 PM

    ashik36 said:
    can a 450w psu with 20A on 12v rail run it


    Marginally. The CPU is no more than 125W, the card is sub-100W I think, so you're kinda ok. But you don't have much breathing room at that point.

    Does your PSU only have one 12v rail? Cuz 12V x 20A is only 240W.
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    a c 1217 ) Power supply
    a c 578 U Graphics card
    January 5, 2014 9:03:58 PM

    For a system using a single Radeon HD 6670 graphics card AMD specifies a minimum of a 400 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 20 Amps or greater.

    Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.
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    a b ) Power supply
    a b U Graphics card
    January 6, 2014 1:23:42 PM

    A 450W with only 20A on the 12V rail? Is that the only 12V rail? If it is that is not a 450W supply. It may say that but it isn't

    How about the brand and model #
    All PSU's are not created equally
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