Welcome to Tactical Gamer

User Tag List

Page 1 of 2 12 LastLast
Results 1 to 15 of 25
  1. #1
    Achievements:
    SocialYour first GroupRecommendation First ClassVeteranCreated Album pictures
    Awards:
    Community Award

    WhiskeySix's Avatar

    Join Date
    Oct 2005
    Posts
    11,156
    Blog Entries
    3
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)

    110CFM Laptop Cooler

    Introduction
    I use a Dell Inspiron E1705 with a Nvidia GeForce Go 7800 video card. This is a great card, but it generates a LOT of heat in a laptop. For this reason (to reduce heat production) Dell ships the card underclocked with a core clock of 250MHz (down from almost 400MHz in the desktop version of the card). With stock Dell cooling, the card would idle in the ~60C range and max out at almost 80C under load. Once I realized this, I decided some auxiliary cooling was in order.

    I tried a Bytec laptop cooler, but was quite disappointed. The problem with it, as with most generic laptop coolers, is that it just blows air around the base of the laptop. What I wanted was something to blow cool air into the intakes for each fan. The GPU and CPU fans are located towards the back of the laptop, with the GPU being on the right side and CPU on the left (when right-side-up). The both are centrifugal fans that pull air in from above and below and blow it out the back of the laptop:



    So to increase the air-flow, I decided to implement something like a cold-air and/or ram-air intake on a car. I did this using a 120mm fan to blow air through 3" PVC routed directly to the intakes:



    With around $40 in parts, I was able to increase my GPU clock speed by almost 50% to over 370MHz!! What follows is directions on how do create this cooler yourself. If you're having heat problems with your laptop or want to explore overclocking*, give it a try!





    What you will need


    • (1x) 120mm fan - I highly recommend the 9-bladed Sliverstone FM121. It comes with a fan-speed control knob included, has variable output between 38CFM and 110CFM (plus it's all white)
    • (1x) 3" x 24" PVC Pipe - HomeDepot sells PVC pipe in 2 foot lengths for a few dollars
    • (2x) 3" PVC "T-Hub" connectors - These have a short rise on the perpendicular branch of the split.
    • (1x) 4"-to-3" 90 connector
    • (1x) 12v, 0.5A DC Power Supply - I happened to have a few of these lying around, but you can get them cheap at any RadioShack. (The connector on the end doesn't matter because we'll end up cutting it off anyway)
    • (1x) Plastic Shopping Bag
    • (12x) 4" zipties (white)
    • Wire cutters
    • Drill with a various sized bits
    • Pliers
    • Non-conductive tape




    Step 1: Mount the Fan
    The first thing to do is lay the 4"-3" bend piece on it's side. In addition to holding the fan, the 90 bend works like a kick-stand to keep the base flat. Center the fan on the opening and drill four holes into the to the sides of the opening. From the inside, insert a ziptie into each hole so that the 'nut' of the ziptie is inside. After checking to verify that the output of the fan will blow into the tube, run the 'pointy end' of each ziptie through the mounting hole and attach the 'nut' from another ziptie. The tie's I was using weren't holding well, so I ended up using two for each corner:





    Step 2: Connect the Power Supply
    - Drill a hole in the inside-bend of the 4"-3" bend pipe.
    - Cut the tip off of your [unplugged] DC Power Supply, and then run the wire through the hole.
    - Cut the adapter off of the power-wire for the fan and splice it together with the supply wire. (red to red, black to black, then wrap with electrical tape.)
    - Tie a simple knot in the end of the joined wire to prevent it from coming back out through the hole we just drilled.






    Step 3: Install the Fan Controller
    This SilverStone fan is variable speed and comes with a nifty little knob controller. The first thing to do is to remove the knob from it's panel - once you pop the knob off, there's a nut holding the actual controller in place. This will likely require pliers or a wrench to remove.




    Next, you'll need to drill a hole in the outer wall, opposite the power-supply hole. You'll need to move the drill around in order to flair the hole enough so that the nut gets a bite on the threads the outside of the tube:




    Once you have the knob installed, you need to deal with the wire. The fan-kit allows for the knob to be 3ft. from the fan, but here it's only a few inches so there's a lot of extra wire. You can either gather and tape it to the side as shown above, or just cut out the middle portion of the wire and splice it back together (which is what I did).






    Step 4: Prepare the Base
    Now we're ready to start building the PVC base. First thing to do is measure and cut the 3"x24" pipe to fit your laptop. As shown above, you want the outside of the exhaust ports to be over (under really) the intakes of your laptop. (be sure to account for the overlap between T-Hubs and pipe when before cutting. Once you have the center pipe cut to length, connect all three pieces, and level them (put them face down on the table so that the openings are on the same plane):






    Step 5: Plug end of the Base
    There's a million different ways one could do this, but I decided to use a white plastic shopping bag wrapped over a small scrap of PVC... works like a drum head, and forces all 110CFM of air up towards the laptop.






    Step 6: Orient the Base
    Before connecting the fan, the base must be placed under the laptop to establish the proper angle.



    In this configuration, the base has a tendency to roll forward or back. This rolling will be stopped once we attach the 90 fan connector.




    Step 7: Connect the Fan Assembly
    Once the Laptop is stable on top of the base, slide on the Fan Assembly. This will act like an outrigger to balance the whole system:






    Step 8: Enjoy your new cool laptop!



    (My desk is a little cramped, so I ended up pointing the fan shroud down towards the floor - as you can see in the photo on the left. This did make the base a little less stable than when it was on the desk, but this was solved using a couple of pieces of foam to give the front of the laptop some traction)



    Notes:

    • The pressure is so high when it's at full blast that it overwhelms the built-in fans - air actually blows out the side and top intakes for each fan. To mitigate this, I just added some scotch tape over those inlets so that all the flow is redirected over the heatsink in by the rear exhaust port.
    • The PVC should fit together well enough that no adhesive is necessary
    • If you don't have CPU heating problems, the end-plug barrier (shopping bag in this instance) can be placed between the T-Hubs, so that ALL of the air goes to the GPU heatsink)






    Results:

    As I mentioned above, this mod let me increase my videocard speed from 250MHz to over 370MHz. Not only that but my max temperature actually dropped under load. At 250 MHz, without the cooler, the GPU temperature peaked at nearly 80C. At 370MHz, with the cooler, I peak at 68C!

    In game (BF2), this clock boost translated linearly to almost a 50% increase in average frame rate. Using FRAPS to log my framerate every few seconds, I saw my average increase from ~50FPS to around 75FPS!










    *blah, blah blah, everything you do, you do at your own risk



    [digg it?]
    Last edited by WhiskeySix; 05-20-2007 at 03:14 AM. Reason: missing words

  2.  
  3. #2


    Join Date
    Jan 2006
    Location
    United states, TN
    Age
    42
    Posts
    2,530
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    Brilliant!
    Retired 6th DB

  4.  
  5. #3
    Achievements:
    SocialYour first GroupVeteranCreated Blog entryTagger Second Class

    sc1ence's Avatar

    Join Date
    Feb 2007
    Location
    Infrequent lurker
    Age
    42
    Posts
    2,416
    Blog Entries
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    very cool. Literally, and figuratively.

    Up, sluggard, and waste not life; in the grave will be sleeping enough! Benjamin Franklin

  6.  

  7. #4

    jackmacokc's Avatar

    Join Date
    Sep 2005
    Location
    Oklahoma City, OK
    Age
    36
    Posts
    72
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    Sweet whiskey..nicely done. Strangely I found a link to this on Hack A Day http://www.hackaday.com/2007/05/20/f...aptop-cooling/
    |TG|JackMac4


  8.  
  9. #5

    Achievements:
    SocialYour first GroupRecommendation First ClassVeteranCreated Album pictures
    Awards:
    Posting Award

    Apophis's Avatar

    Join Date
    Oct 2001
    Location
    Northeast, USA
    Age
    42
    Posts
    8,409
    Blog Entries
    12
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    Dugg! It also made it to the front page of hackaday.com. Oops. Jack beat me to it!

    Diplomacy is the art of saying "good doggie" while looking for a bigger stick.

    43452045524748454146204742204754202d204642424121

  10.  
  11. #6
    Achievements:
    SocialYour first GroupRecommendation First ClassVeteranCreated Album pictures
    Awards:
    Community Award

    WhiskeySix's Avatar

    Join Date
    Oct 2005
    Posts
    11,156
    Blog Entries
    3
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    "sure, it's not pretty" pffff... puhlease. White's the new plaid.
    Last edited by WhiskeySix; 05-21-2007 at 11:19 AM.

  12.  

  13. #7

    Achievements:
    SocialYour first GroupRecommendation First ClassVeteranCreated Album pictures
    Awards:
    Posting Award

    Apophis's Avatar

    Join Date
    Oct 2001
    Location
    Northeast, USA
    Age
    42
    Posts
    8,409
    Blog Entries
    12
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    Insane.. Over 2500 thread views since this was posted.

    Diplomacy is the art of saying "good doggie" while looking for a bigger stick.

    43452045524748454146204742204754202d204642424121

  14.  
  15. #8

    flux's Avatar

    Join Date
    Oct 2003
    Location
    Charlotte, NC US
    Age
    42
    Posts
    424
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    An here I thought I was special with my Toilet PVC mod. Nice work!

    flux
    [tg-c1]

  16.  
  17. #9
    Achievements:
    SocialYour first GroupRecommendation First ClassVeteranCreated Album pictures
    Awards:
    Community Award

    WhiskeySix's Avatar

    Join Date
    Oct 2005
    Posts
    11,156
    Blog Entries
    3
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    ^^^


    After some more experimentation, I'm definitely no longer temperature-limited. I can run the GPU at any speed and get the same peak temps (67-69C). Now I'm just speed-path limited by the GPU die itself. I can run at 379MHz, but 380MHz fails the nVidia control-panel's built-in test. nVidia must have binned some lower performing GPU's for use by Dell since they knew they'd be underclocking... looks like 'standard' 7800's are supposed to run at 400MHz.

    I've also found a sweet spot for the fan-speed. Not sure what RPM's it's running at, but cranking it up to leaf-blower mode isn't necessary

  18.  

  19. #10
    Achievements:
    SocialVeteranCreated Album picturesCreated Blog entry25000 Experience Points

    Dick Blonov's Avatar

    Join Date
    Feb 2006
    Location
    |xargs -r rm
    Age
    57
    Posts
    3,958
    Blog Entries
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    I love it!

    Great plumbing job

    DB

    That looks like a really nice house except for that horrible bathroom. Donrhos

    PR:How to get started | Teamspeak | Banned ? Kicked ?







  20.  
  21. #11

    loyalguard's Avatar

    Join Date
    Apr 2006
    Posts
    1,137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    That is awesome Whiskey! PVC...it's not just for plumbers and sk8ters!
    LoyalGuard

  22.  
  23. #12

    jmaker's Avatar

    Join Date
    Jan 2006
    Location
    Warren, OH
    Age
    34
    Posts
    2,111
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    You are brilliant my friend!
    |TG-12th| jmaker

  24.  

  25. #13


    Join Date
    Aug 2007
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    love the portability of it m8. interestingly enough i've been doing something similar by just putting my laptop over the AC vent! LOL. will definitely be heading to the homedepot.

  26.  
  27. #14
    Achievements:
    SocialRecommendation Second ClassVeteranCreated Album pictures10000 Experience Points

    Fighter's Avatar

    Join Date
    Jul 2008
    Location
    South Carolina
    Age
    20
    Posts
    1,135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Thumbs up Re: 110CFM Laptop Cooler

    Quote Originally Posted by tetsuo001100 View Post
    love the portability of it m8. interestingly enough i've been doing something similar by just putting my laptop over the AC vent! LOL. will definitely be heading to the homedepot.
    lolz. That is actually a good idea. Absolutely brilliant and very resourceful Whiskey, you should appear on GMA for a technology segment.(with Bamboo of course )

  28.  
  29. #15

    =DdogG='s Avatar

    Join Date
    Nov 2003
    Location
    Ennis, TX
    Age
    37
    Posts
    2,131
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: 110CFM Laptop Cooler

    wow - Zombies walk among us....

    I thought Halloween was over.
    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -Albert Einstein
    The two most common elements in the universe are Hydrogen and stupidity. -Harlan Ellison

    If all else fails: "rm -rf /"

  30.  
Page 1 of 2 12 LastLast

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Back to top