Possible to use GPU in Slave only ? AW 18

Discussion in 'Alienware 18 and M18x' started by ll_r1d0_ll, Jun 16, 2020.

  1. ll_r1d0_ll

    ll_r1d0_ll Notebook Evangelist

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    yeah i just undervolted it by -25mv and now temperature seems to be better...i saw in the forums that NVIDIA heatsinks dont fit properly on the Gpu's and create a bend from the vram's side .. i might open it up soon and use a dremmel tool to lower that part of the heatsink and see if there is any improvement... I always loved the 18 inch laptop, especially the AW 18 and i read alot of replies by raidriar in the forum telling that the mosfets used to blow up .. i replaced those mosfets from the AW17 motherboard and now i am expecting that they wont blast atleast lol .. i even installed a thermal pad on top of mosfets but still the HDMI port near the DC jack feels like burning so i wonder what those mosfets might be going through . Just a poor design for mosfets section by Alienware i must say .. apart from that the machine is awesome . I might go for PWM switch in future
     
  2. islam

    islam Notebook Guru

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    actually i was running the 780m on the same clock of the 880m for 6 years and the temperatures was as i mentioned above , i know that the 880m runs hotter then the 780m but thats not due to that the 780 is better card , i believe its just as good. i even overclocked it to 130+ on the core clock and 350+ on the memory and the tempratures gut up to 91C within 12 minutes so i like to keep it stock clock with svl7 bios. however all these temps above is while rendering and very little gaming ( i dont do a lot of gaming ). i mainly use my machine for 3d modeling and rendering and just to be clear here, 3dsmax with V-ray rendering engine use GPU rendering more intense on the core rather then the memory . with that been said i think 880m are very stable with the moded Vbios.
     
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  3. islam

    islam Notebook Guru

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    i think i red that u ordered the liquid metal and it is on the way so if thats true then this is the best u can get. just be carful since as i'm sure u know liquid metal is conductive so u need to do some search on how to isolate the chip ( spoiler alert , clear nail polish )
     
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  4. islam

    islam Notebook Guru

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    if u dont mind, can u send a picture of the mosfits on the AW18 motherboard and the parts that u used to replace them ?
     
  5. Maxware79

    Maxware79 Notebook Deity

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    I'm not sure of the compatibility with the 18 GPU fans but it's possible that the 10 CFM fan for the M17x R4 will work. It could help your temps if it actually fits. There is a thread around here somewhere with the part number of the better fan.
     
  6. ll_r1d0_ll

    ll_r1d0_ll Notebook Evangelist

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    yes i am aware of that as i once applied coollaboratory liquid ultra on my Asus G73jh's GPU (HD 5870M).

    umm actually i didnt took any pictures which replacing them but i can definitely provide you with the part number you need to order and just replace the mosfets, also the area of the AW 18'S MOSFETS which usually FAIL.

    MOSFET Part Number
    : SI7149DP.......The ones i removed from AW18's mobo were having different number which i dont remember now lol but according to the SCHEMATICS of AW 17 R1 and AW 18 , they both use the same MOSFET PART NUMBER.

    PICTURE of MOSFET AREA :

    mosfets.jpg

    Well the AW 17's fan doesnt seem to fit need to make some modification for that so i will take a look at that but the main culprit of temps which i seem to have found is the NVIDIA HEATSINK as it doesnt fits on the COILS and VRMS and bends the GPU'S PCb as shown in @DaMafiaGamer 's GTX 1070 Upgrade post . My gtx 880m also bends like this and reason is also explained in his post so i might use a dremmel tool to grind that area of the heatink and see the results. [​IMG]
     
  7. islam

    islam Notebook Guru

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  8. Chivalrous Roamin Knight

    Chivalrous Roamin Knight Notebook Enthusiast

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    Hey there, ll_r1d0_ll! I too have an Alienware 18; mine is running a single 980M in it's Primary Slot. An issue mine has is almost exactly as you are saying and seeking a solution, a world, and I MEAN an EXTREME WORLD of difference was made when I ventured into adding an external laptop fan; my temps on that top left side of the keyboard decreased drastically, in accordance, I don't experience throttling or any lag whatsoever when I do any gaming anymore! Now, the best and maybe even the only external fan that is effective is this one: https://www.amazon.com/OPOLAR-Tempe...mobile_desktop?ie=UTF8&psc=1&ref_=ya_aw_od_pi
    It draws heat out of the laptop and the fan of it is the highest rpm's of any of the other laptop external fans offered; in addition to that, this Opolar fan has a 1 of 3 shrouds that fit on the fan opening that are big enough to accommodate the AW 18's rear vent. I'm pretty confident this will satisfy your issue; it did mine.
    It's simplest solution so effective for me, I even received another one of these fans just today as a spare so I would have another in the case the one I have attached that something would happen with it. The auto feature of the fan is a bit quirky though: just make sure you set the fan on it's highest setting, which is 13 and do that manually. Then, when the fan draws heat from the laptop, THEN, you can set the fan's auto function simply by turning it off then immediately it on again and it should work as intended in it's auto mode; some graphically demanding games may require the manual setting of the fan's highest setting of 13 though. Just keep in mind of that. Definitely, try this solution before you do any other; again, I'm pretty confident you will be satisfied even shocked of the result. Would also like to know how this worked out for you, so please comment back about it. Thanks!
     
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  9. ll_r1d0_ll

    ll_r1d0_ll Notebook Evangelist

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    hey @Chivalrous Roamin thanks alot for this idea. I tried that with one of a server fan running at 12V 1A , and the temperature decreased drastictly. The thing is that i cannot carry this fan which u showed or put it all the time on my desk as i depend alot on ALIENWARE'S cooling system itself which should have been better . My first experiment would be grinding the HEATSINK to make it sit properly on the inductors and coils and vrms and if there is no difference, i might go for one of this :) thanks anyway.
     
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