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    gx640 120 adapter + i7?

    Discussion in 'MSI' started by GapItLykAMaori, Nov 24, 2010.

  1. GapItLykAMaori

    GapItLykAMaori Notebook Evangelist

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    Finally bought the i7 720QM ($130US!!!!, OEM as well). So im just wondering if the stock 120w could handle it with my gpu OC of 750/1000 @ 1.0v. Would I need to buy a 150w adapter?
     
    GapItLykAMaori, Nov 24, 2010
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  2. Bearclaw

    Bearclaw Steaming

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    Wow nice deal where did you find it?
     
    Bearclaw, Nov 24, 2010
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  3. GapItLykAMaori

    GapItLykAMaori Notebook Evangelist

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    Friend of mine bought a g51 but after a few months realised an i7 was a waste. He wants it gone so im trading my i5 430m for his i7 720QM + 130buks.
     
    GapItLykAMaori, Nov 24, 2010
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  4. oj287

    oj287 Notebook Enthusiast

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    I think with this overclock and under normal conditions the stock power supply should be able to handle the load but just barely. However you might run into trouble with games that are both graphics- and CPU-heavy.

    I also recently upgraded to an i7 - the 820QM - and I hooked up the laptop to a Kill-a-Watt type of device to monitor the power draw. I haven't benchmarked the CPU yet since I'm not quite happy with the temps and will reapply the thermal paste before doing that but I have run FurMark. With the GPU overclocked to 750/1050 and the CPU lightly loaded the laptop was drawing ~130 W (132 if my memory serves me right) from the wall. Now granted, the kill-a-watt is not 100% accurate and the PSU is not 100% efficient but it's still clear that it was operating very close to its rated 120 W power. Since the CPU wasn't running full throttle I think it's safe to assume that it wasn't drawing much more power than a 720QM would in a similar situation...

    So while the stock power supply should be good enough for regular use it probably won't be enough if you run the GPU overclocked with both it and the CPU heavily loaded.
     
    oj287, Nov 24, 2010
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  5. GapItLykAMaori

    GapItLykAMaori Notebook Evangelist

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    kk thnx for ur advice. I might as well buy the 150/180w power adapter.
     
    GapItLykAMaori, Nov 24, 2010
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  6. kosti

    kosti Notebook Virtuoso

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    I guess it depends on what you use it for. Personally I notice a big difference when encoding HD videos to mp4 format. The process is a lot quicker on my M15x with 720qm than it was on my GX640 with 430m.
     
    kosti, Nov 25, 2010
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