The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    300W AC Adapter vs AMD 7970M CrossFire

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Alloid, Sep 13, 2012.

  1. Alloid

    Alloid Notebook Enthusiast

    Reputations:
    0
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    5
    Hello,

    Can you please help me.

    I am going to order an Clevo 370 with AMD 7970m CrossFire + i7 3720QM.
    And the last think what I need to find out:

    Does this 300W enough to use this 7970M crossfire for the 100%?

    In some forums people saying that this GPU's need a 600w adaptor.

    Thank you for your help,
    Alex
     
    Alloid, Sep 13, 2012
    #1
  2. narsnail

    narsnail Notebook Prophet

    Reputations:
    2,045
    Messages:
    4,461
    Likes Received:
    1
    Trophy Points:
    106
    narsnail, Sep 13, 2012
    #2
  3. Alloid

    Alloid Notebook Enthusiast

    Reputations:
    0
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    5
    How I can see you ordered the same configuration notebook.
    Actually eurocom is the only one reseller who got option for the one 600W AC adaptor.
    Do you know why?
     
    Alloid, Sep 14, 2012
    #3
  4. Alloid

    Alloid Notebook Enthusiast

    Reputations:
    0
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    5
    Strange.
    In reviews on notebookcheck.com is writen that single 7970m needs 100W.
    So Dual 7970m CrossFire will need around 200W together, i7 3720qm is 75W aprx. In summary it is around 300w.
    Are you sure that 1 AC adaptor for 300W in enough?
     
    Alloid, Sep 14, 2012
    #4
  5. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,431
    Messages:
    58,189
    Likes Received:
    17,900
    Trophy Points:
    931
    The 7970M is rated UP TO 100W. Typically it will consume much less.

    You only need above 300W if you want to overclock.
     
    Meaker@Sager, Sep 14, 2012
    #5
  6. narsnail

    narsnail Notebook Prophet

    Reputations:
    2,045
    Messages:
    4,461
    Likes Received:
    1
    Trophy Points:
    106
    I think only under the circumstance of getting the 3920xm with the forethought of overclocking to 4Ghz and beyond in tandem with a dual card setup which you also plan to overclock would you actually NEED the 600watt adapter. The 7970m is rated at 100w TDP, but as Meaker said it will usually not use that much power. Even with a decent overclock I don't think those cards reach 100w each. TDP is different from actual real world power draw.

    For the record! The i7 3720qm @ 75 watts was the entire system with only the CPU fully stressed, so that included MB, RAM, drives, GPUs, etc, all at idle. Were probably only looking at around 50-55 watts for the i7. Should even have some minor overclocking headroom (using XTU, an Intel overclocking utility, you can push the i7 3720qm up to 400mhz past base clock, so up to 3ghz). I can probably get a hold of wattage meter or something like it from work once my unit comes in and you can have a real answer. I think it will absolutely be more than enough though.
     
    narsnail, Sep 14, 2012
    #6