Pwm bypass switch on 17 r1

Discussion in 'Alienware 17 and M17x' started by kaibsora, Mar 4, 2019.

  1. kaibsora

    kaibsora Notebook Consultant

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    Hello all! This guide/build log is inspired by @Striker1234 's lovely rocker switch for the pwm issue on our notebooks. If your here it's because you, like me, have an issue with the fan not keeping your CPU fan cool while gaming, and you dont care about noise either

    Bit of a tl;dr
    This laptop doesnt easily allow fan control throught the bios or windows, nor does it ever run the fans at max rpm. To bypass this, you need to cut the pwm wire on the fans. However, doing this makes the fan run at full speed, all the time, which is loud but it lowers temps alot! A way to fix this is by installing a switch of some sort so that you can make the fan work normally when you dont need it at max speed.

    ****disclaimer****
    I am not responsible for anything you do to your laptop. I am simply making a guide on what works for me, and therefore not responsible if something you do breaks your laptop. Doing this does void any kind of warranty you may have(LOL)

    Things you will need:
    Either a push button or rocker switch(two if you are doing this for GPU too. The rocker switch requires a dremel.)
    Drill AND dremel with drill bits
    Soldering iron
    Solder
    Heat shrink tubing (or electrical tape)
    Wire(doesnt matter the gauge as this is a signal wire that doesnt carry a current)
    Electrical tape or epoxy(choose electrical tape if you want to remove it later
    And of course an alienware 17 r1 laptop
    Would probably be best if you also had spare fans, just in case.

    First things first. You need to know which is the pwm wire on your fans. it is the second one from the right on the connector with the tabbed side. see pic. this is true for both the cpu and gpu fans.
    [​IMG]
    this will be wired to either end of the switch

    now that thats out of the way, you need to fully disassemble the laptop, and i reccommend taking the panel off as well, as you willbe getting metal shavings everywhere in a little bit.. once the machine is disassembled you can find out where you have room to put a switch. like i said, you will have the most room where the "lock" is. See pic as this is where i am putting mine.
    [​IMG]
    I ended up using the two of the buttons on the right for my mod. i didnt use the black button

    [​IMG]

    This is the area i was scoping out for the placement of the switch. i left the motherboard in just to make sure i had enought room for both

    [​IMG]
    outside look on the lock area.

    Alright. you have your switches, you have where you want to place them. you have the laptop COMPLETELY disassembled. Well nows the hard part. You will need to dremel and make cutouts for what ever switch you are using. What i did, may or may not work for you, and having smaller buttons than me will definately help. take your time on this part, because you cut the wrong thing and youll end up having to order a new chassis. this is all metal too, so make sure you are using eye protection and maybe a mouth mask. My advice is to make marks on what the area that needs to be modified so you know what is needed to be done. see my pics for reference on what I DID to get MY RESULTS.
    [​IMG]

    after cutting out the lock box

    [​IMG]

    drilling and deburring the holes for the proper placement of the buttons

    [​IMG][​IMG]
    Test fitting the buttons!

    Awesome! you've made it this far! Good on you! hold on just a little longer, we are almost done :)

    Now that everything is set, you must run wire. Now this is easier the thinner the wire, and also you don't need much at all if the only one you are doing is the cpu. but because i was doing the gpu as well, i needed to run wire all the ware across the chassis. Again, See pics for what i mean.

    [​IMG]

    this is me running wire for the gpu fan pwm. It was really tight because i was using thicker than needed cable.

    [​IMG]
    The cpu pwm wire really doesnt need to be as long as it can be run straight through the regular fan cutout.

    [​IMG]

    I leave extra wire for the ability to completely disassemble later without too much fuss. This is the gpu fan wired.

    See? your here, and almost ready to reassemble. I hope you remembered to test fit with the motherboard before getting here ;)

    you should wire the fans now, and do final fit tests before you reassemble. you can use epoxy to hold the switch in place, but i like to have a removable switch in case i need to resolder or something im just using a bundle of plastic heatshrink tubing to put pressure against the switches.) below are my finished pics. Hope you enjoyed this rough guide on pwm cutting. :D

    [​IMG]

    [​IMG]

     
    Last edited: Mar 6, 2019
    t456, Striker1234 and TheReciever like this.
  2. kaibsora

    kaibsora Notebook Consultant

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    Reserved
     
  3. VoodooBane

    VoodooBane Notebook Consultant

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    I did not do this mod yet but i did do this. Maybe both together would be the best? Ill tell you what. Ranger is so much better now. You can even swap any fan u like in and out it would Insane!!!!

    Here the to the name of the controller on ebay.

    Via url https://www.ebay.com/itm/Smart-Spee...g-Fan-4-Pin-/141302259926?txnId=1630642927004

    Search via name
    Smart Speed Controller for Laptop / Notebook DC 5v PWM Cooling Fan 4-pin

    Sent from my SAMSUNG-SM-G928A using Tapatalk
     
  4. kaibsora

    kaibsora Notebook Consultant

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    The reason I'm not using something like this is because the stock pwm works fine for everything except for gaming aand overclocking In a sense this does exactly what my mod will do, just with the potential of controlling the fan speed manually, which isnt what I'm interested in right now. It might be something interesting to do later on, but I'm happy with the fan being controlled by the ec when my system isnt being gamed on. Perfoictly quiet :)
     
  5. TheReciever

    TheReciever D! For Dragon!

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    Waiting to see where you decide to put the barrel switches.

    I have been busy and also waiting on the sire stripper to arrive in the mail so I can better handle this stuff.
     
  6. 2CPU

    2CPU Notebook Consultant

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    I'm adding the thermal switch that opens at 85*C and closes at 65*C, that way I don't have to think about it.
     
  7. VoodooBane

    VoodooBane Notebook Consultant

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    Ah ok. For gaming it it a told NEED! It has 20 degree fans speeds(4 or 5 pwm signals) it is wonderful! Fans are always running! My laptop is always cool to the touch:)

    Sent from my SAMSUNG-SM-G928A using Tapatalk
     
  8. kaibsora

    kaibsora Notebook Consultant

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    Ahh this makes sense! But for me, I like having manual control.

    Wait for the OP to be updated in an hour or two. This is actually complete now
     
  9. TheReciever

    TheReciever D! For Dragon!

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    Awesome, looking forward to it!
     
  10. kaibsora

    kaibsora Notebook Consultant

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    Update op with full mod!
     
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