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ASUS G51 Cooling mod

Discussion in 'ASUS Gaming Notebook Forum' started by kondor999, Aug 25, 2009.

  1. kondor999

    kondor999 Notebook Consultant

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    [​IMG]

    My primary motivations were curiosity and I hate fake hood scoops and such. I really thought that big round thing on the bottom of the G51 was an air intake with a permeable covering.

    UPDATE2 8/25/09:

    I strongly recommend you not mod the stock backplate like I (impulsively) did. Instead, order this: http://estore.asus.com/shop/item.asp?itemid=4675&catid=606

    For 8 bucks, you can mod this backplate and keep your stock one...stock. It might be hard to get warranty service with a big hole in your notebook.

    UPDATE1 8/25/09:

    IT WORKS. These temps were all obtained with me holding the notebook on my lap and ensuring the intake was unobstructed. Ambient temp is 72F in my house. It is CRITICAL that the vent have a reasonable source of cool, fresh air (like sitting on my lap). If it's sucking in the dead, hot air that exists directly under the laptop, you may not get the max effect. Further testing to see the effect on a desk with the rear propped up is to come soon. I suspect the temp drop will NOT be as great as what we're seeing here. BUT, I also think that combining this mod with a good laptop cooler will lead to GREATER decreases than this.

    Full 3Dmark run after a clean boot:
    Before - max 94c (P7350, all stock clocks)
    After - max (are you ready?) 81c (X9100@3.4Ghz, 600-800-1500)
    RESULT = 13c decrease

    Furmark run #2:
    1366x768 8x AA
    Before: max 97c and climbing (P7350 and GTX260m at stock clocks)
    After: Max 90c, then falls to equilibrium of 84c (X9100@3.4Ghz, GTX260m@600-800-1500)
    RESULT = also a 13c decrease

    ASUS, you can officially kiss my as*. They must have made an "engineering" decision that, as long as the GPU stayed below 108c (the throttle speed), the cooling system was "good enough".

    Idiots.
     
  2. weylyn

    weylyn Notebook Enthusiast

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    Looking very nice.

    And if it doesn't help, oh well. It can't hurt either, right?
     
  3. munchkin-man

    munchkin-man Notebook Consultant

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    I was the first of the G50 and G51 owners to do thislmfao. I did it about 4 months ago with my G50 cover. I drilled the hole about 3 inches in diameter and used window netting as a cover to keep out some dust and physical contact.

    Obviously you did a MUCH better job. Plus 10 broman it looks really nice.

    Unfortunately it did take 3 months for me to realize that with this mod you are getting fresh air into the fan but....the cpu and gpu are no longer having the surface heat pulled away, thus making not much of a difference unless you have a custom cooler blowing air into the fan and the gpu vent like I did.

    The smartest thing to actually do would be to carefully and precisely drill out a rectangle shaped hole above the gpu and use a metal mesh like material to cover it, also doing the same above the ram and the hardrive. That way the surface heat is pulled away and more air is easily pulled by the fan from remote locations.
     
  4. kondor999

    kondor999 Notebook Consultant

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    Thanks for your kind remarks. I agree with you about increasing passive cooling around the GPU. But it does already have vents above that area - I wonder if it would do any good? Is that your WRX btw? I loved mine but lost it in the divorce (which is cool - very safe car for my ex).

    I'm starting to think that the cooling system for the GPU just can't transport enough heat to the fan in order to ultimately reject it. That's maybe why increasing the fan's efficiency (via mods such as this) doesn't do much.
     
  5. munchkin-man

    munchkin-man Notebook Consultant

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    lol dude I didn't mean to come off as a , I was just saying what I noticed with my laptops lmao. The gpu is cooled but it still radiates a bit of heat which the fan also sucked from the surface of it. If its on a cooler, you see a big difference though, flat on a desk the temps rise up even more.

    Yea it's my rex, sorry about yours dude what year was it? Any mods?
    Mines a cobb stage 2 remap. No major engine work. Has a kevlar clutch, turboxs uppipe, hks down pipe, hks carbon ti exhaust, k&n typhoon intake and a stock turbo pushing out a good 21lbs steady. It's a great car, only regret I have is buying an 02. The tranny is already rebuilt twice o_O.
     
  6. lucretio

    lucretio Notebook Enthusiast

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    this mod lowered the temperatures?

    how much?


    thx
     
  7. kondor999

    kondor999 Notebook Consultant

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    I will post data as soon as I can. I want to make sure it's good data before people start cutting open their cases. Thus far (subjectively), I don't believe it's done much. But it may magnify the effect of a laptop cooler
    (since that would provide a better source of cool air).

     
  8. Warhammer40k

    Warhammer40k Notebook Evangelist

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    Please do. Also is that just a free air solution or did you install a fan to force air in/out?

    Also depending on the results or if people would like to do it themselves they can always order a replacement bottom to "mod" while leaving the original alone. This way if they mess up or dont like their individual results they are not stuck with it. Not to mention the assembly is cheap i.e sub $8 (it looks like this is interchangable with the G51)
    http://estore.asus.com/shop/item.asp?itemid=4675&catid=606

    I plan on picking one up to mod but more through an increase in free air slits near the CPU and GPU.
     
  9. Soviet Sunrise

    Soviet Sunrise Notebook Prophet

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    So is anyone going to put spinners on their G51?
     
  10. lucretio

    lucretio Notebook Enthusiast

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    Great man...i was thinking the same way too...just cutting the "skin" maybe nothing happens, but when combined with a notebook external cooler this mod could start taking effect

    my gtx260m is operating in 60c iddle and 85c full (average)

    i'm waiting for your results...

    thank you


     
  11. kondor999

    kondor999 Notebook Consultant

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    Here's another idea:
    http://estore.asus.com/shop/item.asp?itemid=5041

    I really want to put in a better fan. I'm going to scrounge in my parts bin and see what I can come up with while this hot POS is still under warranty.

    That looks like a generic fan to me - I could be wrong. Seems like I've seen nearly identical ones on GPU's in the past. I've got an entire collection of old cooling solutions that might come in handy.

    I just can't understand why they would put in such a weak fan, given that it's the one part of the thermal equation which doesn't add weight, cost, or space. Simply run the f**ker at a *much* higher rpm - damn the noise.

    I'd rather have a little noise than a 97C GPU temp.
     
  12. kondor999

    kondor999 Notebook Consultant

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    You can't get much more ghetto than cutting a hole in it. I'd say we're already there.

     
  13. Warhammer40k

    Warhammer40k Notebook Evangelist

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    pleeeeease......

    Whitewalls and curb feelers ftw
     
  14. a3r0x

    a3r0x Notebook Evangelist

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    Isn't the fan u gave a link to the same as in the G51. At least it looks the same...?
     
  15. munchkin-man

    munchkin-man Notebook Consultant

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    LMAO That is not a better fan. It is the fan from the G50 and it spins at a tad slower rpm than the G51 does. Plus if you pay attention closely the spindles are different. The G51 fan spindle has a concave to it, allowing air to form a toilet effect while the G50 fan spindle is flat.

    Hey Kondor, can you tell me what mesh like material you used? My window netting is getting a bit flimzy.
     
  16. Rezigrene

    Rezigrene Notebook Evangelist

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    I'd still be worried about particulates getting through that plastic mesh.

    I can see it sucking up more dust, that's for sure.
     
  17. munchkin-man

    munchkin-man Notebook Consultant

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    It's not that strong lmao! It does not suck up much dust. I ran my G50 without mesh, just a hole, for a month and then took off the bottom panel and blew it out with a compressor and barely any dust blew out.
     
  18. Soviet Sunrise

    Soviet Sunrise Notebook Prophet

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    Dust is natural for all computers. Just clean it out once in a while.

    I was also thinking about installing hydraulics on the G51 so that the back of the laptop would prop itself up with the touch of a button.
     
  19. kondor999

    kondor999 Notebook Consultant

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    Guys, I don't mean to get too excited, but I think I figured out why I wasn't getting much improvement in GPU temps. I had the G51 sitting flat on a table - with the result that the fan intake was basically just as close to an obstruction as it was before the hole was made.

    I simply propped up the rear of the notebook, and I can't get my GPU to go over 90C now. Before, it was hitting 97c during ARMA II gaming.

    Let me make absolutely sure, but I'm thinking maybe it worked.

    Munchkin: I used the metal grille from a laptop cooler called Notepal (made by Cooler Master) which is all-aluminum and rather pricey. You might find one online. I have a friggin' collection of laptop coolers and the grille happened to fit perfectly.

    Re: dust, my philosophy is: If there's no dust, there's no airflow either. It's very easy to clean out this very compact cooling system.

    Soviet: that sounds really cool. I'm just going to use some stick-on feet that flip out when needed. I've used them on other laptops and they worked great without adding any add'l thickness to the laptop.

    Lastly, this is really just a big, cheaply made notebook that happens to have a great GPU. Maybe we can mod it to make up for some questionable engineering by ASUS. My #1 question (sorry, gonna shout here):

    ASUS, WHY THE HELL DIDN'T YOU USE THE SPACE TAKEN UP BY THE 2ND HDD TO INSTALL A 2ND FAN/HEATSINK FOR THE GPU ONLY????!!??!

    There. I feel somewhat better.
     
  20. kondor999

    kondor999 Notebook Consultant

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    IT WORKS.

    Running Furmark at 1366x768 with 16xAA with a 3.4Ghz CPU OC and 600/900/1500 on the GPU, it now maxes out at 89c. Note that it does *not* work unless the rear of the notebook is propped up to allow fresh air to enter the intake.

    I know for a fact that the same test, with less AA and less res, resulted in 97c prior to the hole being made.

    ASUS, you can officially kiss my as*. They must have made an "engineering" decision that, as long as the GPU stayed below 108c (the throttle speed), the cooling system was "good enough".
     

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