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    Beefiest Compatible PSU

    Discussion in 'Alienware M15x' started by MatsueMaiku, Jan 16, 2019.

  1. MatsueMaiku

    MatsueMaiku Notebook Geek

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    I have the Dell 240W PSU already, but it's still not enough power. I know about the double PSU mod, but I was wondering if anyone knows of any other really powerful PSUs what will work with the m15x. I don't mind if they are too big to really be portable. I have been looking around a bit myself, I haven't really found anything yet.
     
    Last edited: Jan 19, 2019
    MatsueMaiku, Jan 16, 2019
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  2. MatsueMaiku

    MatsueMaiku Notebook Geek

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    MatsueMaiku, Jan 16, 2019
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  3. 2CPU

    2CPU Notebook Evangelist

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    Last edited: Jan 18, 2019
    2CPU, Jan 18, 2019
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  4. MatsueMaiku

    MatsueMaiku Notebook Geek

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    Thanks for the info. I am already using a 240w PSU with the center pin removed from a 90 degree elbow adapter and it's not enough power. I might just buy the bigger PSU and report back how it goes. I'm a bit worried because some of the reviews are not so good. For example, some of the 330W PSUs aren't actually putting out that much wattage and one guy's PSU caught on fire! :eek:
     
    MatsueMaiku, Jan 19, 2019
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  5. Raidriar

    Raidriar ლ(ಠ益ಠლ)

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    There is a hard power limit (150W?) that cannot be bypassed on M15x. CPU gets priority power delivery, GPU gets secondary. You must limit CPU power to feed sufficient power to the GPU. I’m not 100% as to what the board limit is, but the lower the TDP GPU, the better, unless you severely downclock the 920XM to eat only 50W of power to give the 100W to the GPU. An overclocked 920XM can easily eat 80+ watts by itself. CPU can draw pretty much as much power as it wants, but it will starve the GPU in the process.
     
    Raidriar, Jan 21, 2019
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    M18x-oldie likes this.
  6. MatsueMaiku

    MatsueMaiku Notebook Geek

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    Well, my fairly new 240W PSU has shut off during testing using the SLV7 VBIOS, so that means it's running out of power (blue light ring shut off as well as the laptop). I know others have had success using double PSUs. I should be getting the 330W any day now. I'll let you guys know how it goes.
     
    MatsueMaiku, Jan 22, 2019
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  7. STiHiaL

    STiHiaL Notebook Consultant

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    330W psu wont work on M15x with full output. 240W for single unit or up to 480W for double units mod.
     
    STiHiaL, Jan 23, 2019
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  8. MZWiZard

    MZWiZard Notebook Consultant

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    Not entirely correct. You can modify the 330w psu to give all its got by some mod. I dont remember how, but google around. :)
     
    MZWiZard, Jan 29, 2019
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  9. 2CPU

    2CPU Notebook Evangelist

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    2CPU, Jan 30, 2019
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  10. MatsueMaiku

    MatsueMaiku Notebook Geek

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    My PSU arrived today. It worked perfectly. It didn't trip like my 240w did. HWINFO reports 116 watts of power draw (from the GPU). I'll mess with it a bit more and report back if I run into any problems.
     
    MatsueMaiku, Jan 31, 2019
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  11. MatsueMaiku

    MatsueMaiku Notebook Geek

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    upload_2019-1-31_14-32-9.png
    I'm pretty happy with this result. Maximum temperature was 84C. 121 GPU watt power draw. Stock memory clock and 1126 core clock.
     
    MatsueMaiku, Jan 31, 2019
    #11