Re-gooping c2d MBP: still roasting !

Discussion in 'MacBook Pro' started by Kumbi, Apr 7, 2007.

  1. Kumbi macrumors newbie

    Apr 7, 2007
    So, with the high temperatures I'm getting (55C idle, 90C load) on my c2d MBP, I've decided to crack it open to replace the thermal goop so many people are identifying as the culprit to the heat....
    Original Apple goop
    Cleaned with video head cleaner alcohol
    Amount of Arctic Silver 5 rubbed into each heatpipe mating surface with a lint free cloth (an old, clean shirt)
    Amount of AS5 put onto each die (not spread out) and squished together with heatsink

    Temperature after 5 minutes of running two instances of "yes > /dev/null"

    What do you guys think? Did I do something wrong somewhere ?
  2. Jarcrew macrumors 6502


    Mar 16, 2007
    Cardiff, Wales
    Threads like this are making it really difficult to decide which MacBook (Pro or no) to go for.

    Are the Pros really that hot? I'd heard about the regular MacBooks being hot, that's why I was looking at the Pro... Christ.
  3. Kumbi thread starter macrumors newbie

    Apr 7, 2007
    Yeah they ARE this hot. Even after regooping the damn thing. This MBP is a 2006 Week 51, so it's a fairly recent model....
    If you want some proof I might start the VNC server, and people can watch while I start the tests....
  4. dmw007 macrumors G4


    May 26, 2005
    Working for MI-6
    That seems to be running a good deal warmer than mine. I am lucky if I can break 70c under load on my MacBook Pro. :eek:
  5. JDN macrumors 6502a

    Sep 7, 2006
    Lund Sweden {London England}
  6. Pressure macrumors 68040


    May 30, 2006
    Correction, yours is this hot.

    I have an old MacBook Pro Core Duo 2.16Ghz model where the processor usually hovers around 74°C when doing a lot of work. However, the surface is not at all that hot.

    What are you normally doing to reach these temperatures? How are you working? Do you max both cores out all the time? (I mean, yes > dev/null is not really an indication of normal usage).

    What surface do you put the MacBook Pro on?

    Did you try a PRAM and SMB reset before reapplying the thermal conductor?

    And how do you feel about voiding your warranty? Seriously, it would have been much wiser to just contact AppleCare and explain them the situation.
  7. e12a macrumors 68000


    Oct 28, 2006
    meh, i just get to 70 running VMWare and Defragging under windows whilst using Firefox in OS X, and I idle at low 50s

    what i dont understand is how putting a small amount vs. a large amount would make such a difference. Obviously you can put too little, but if you put too much the excess would just be pressed out from between the HSF and the die and can be cleaned up. Have you ever wondered why apple puts so much in the beginning? Could it be the clearances on between the HSF and the actual die?

    That SomethingAwful forum where hte original post was made used measurements with an infrared thermometer...while sure his outside case was cooler, could it be the lack of contact between die and HSF? thus not effectively transferring heat to the outside case/fans? Why not use a program that utilizes the actual on die temperature reading like smcFanControl or iStat?

    that post on SomethingAwful has since been deleted/removed.

    my guess is you're CPU's at 80C because its no longer making proper contact with the HSF. have you checked to see if the HSF makes contact?
  8. Kumbi thread starter macrumors newbie

    Apr 7, 2007
    Playing Starcraft (via rosetta because SC isn't intel native), the CPU load climbs to 50%, and the temps are hovering around 75C. Not much diff from the 80+C under full load.

    (I have a feeling the fans aren't running at full tilt - maybe I should kill the temp. sensor and put it back together, I can force the fans to run full tilt that way, and I'd rather have fan noise than roasting laptop)

    About the warranty, I don't feel particularly bad because I haven't bought extended AppleCare. Besides, many people have already done (or tried to do) this to lower the temperatures of the MBP!

    Apple will maybe take my laptop for a few days, scratch it up a bit, return it back with a sticker saying "checked, but within spec" (if i had sent the thing in instead)

    P.S Nice sig, Pressure.

    EDIT: @e12a, the bottom area where the heatpipes are, they're hot also. I think the heat is flowing instead of being trapped. (I may be wrong)
  9. daneoni macrumors G4


    Mar 24, 2006
    Yours is, mine has yet to go past 71/72C when running yes dev null for about 40+mins.

    MBP 2.16 C2D

    Do a PRAM/SMC reset and maybe even re-install OSX because your preferences may be screwed up. You could also try SMC fan control

    Thanks for the pics though, anyone know what chip that is between the processor and GPU?
  10. Kumbi thread starter macrumors newbie

    Apr 7, 2007
    Yeah, it's the Northbridge. The goopless chip that says intel is the Southbridge.
  11. Blubbert macrumors 6502

    Nov 1, 2006
    Why not just install a Fan Control software, like Fan Control? I had a fun time with my hot MBP, but since i installed this, the temperature has had a hard time breaking 70C, even under a heavy load. The normal temperature it runs under now is 47C, and thats with iTunes playing, surfing the internet, and some other programs open. And the only thing i had to change is the base speed of the fans to 2000, no thermal paste or any sort of invasive operation.
  12. Collin973 macrumors 6502

    Mar 29, 2006
    The highest temperature I've ever seen my mbp reach is 71C. Mine usually stays around 48C or less usually. I've only seen it get to 71C once or twice. It stays at 48ish with the fans on 2000 rpm (standard setting i believe).
  13. e12a macrumors 68000


    Oct 28, 2006
    ran the dev/null test and after waiting some time for the fans to compensate the temperature is at 70C.

    you could also try folding@home.

    edit: still running, and fans have gradually increased even more, sending the temp down to 69.
  14. dailo macrumors regular

    Mar 29, 2006
    I reapplied mine and the highest it will go is 65 at full load, but most of the time it idles at 42. I have the first version of the MBP and before I would get constant 60-74 degress, but after reapplying it is so cool. The bar above the keys now never gets hot at all and it is very comftorable in my lap. You should make sure you applied it correctly.
  15. heehee macrumors 68020


    Jul 31, 2006
    Same country as Santa Claus
    Mine doesn't get above 74c, and that's opening a huge file. When surfing, listening to itunes, mail and msn, its around 55c.
  16. johnee macrumors 6502a


    you put on too much heat sink goop. The material itself merely allows heat transfer, but ONLY via an EXTREMELY THIN layer. The point of putting the goo on is to fill in the microscopic gaps between wafer back and the heatsink, that's it. if the layer is too thick, you will dampen the heat flow and your processor will retain heat.

    However, since the temperature was high before you even messed with it, the possible problems include:

    fan not coming on / not moving enough air
    blocked airway when trying to cool
    heatsinks warped, not making full contact to chip die
    possibility heat sink had too much goo when originally built (highly unlikely)

    You might have voided the warranty by opening it though
  17. Kumbi thread starter macrumors newbie

    Apr 7, 2007
    I took apart the MacBook Pro once again to re-apply the goop, I used a penknife blade to carefully spread the goop on all 3 chips. Spent a half-hour checking application, and tilting the motherboard around to check that the paste was really as thin as it'd go. Now I idle at 44C and full load at 75C.

    Is that an improvement?
  18. sotl macrumors member

    Feb 14, 2007
    I'd definitely say so, Mine runs 74-78 maxed out running Parallels with a bunch of apps in coherence mode, Camino, Word, Excel, Dreamweaver, Photoshop, and a about 10 other windows I forgot to close.. Some running video. :p

    edit: O yea, it runs that hot because the fans aren't at full speed. I use SMC FanControl and it reports the fans at 4400rpms. I tell it to go to 6000rpms and it cools down to like 68.

    You can just picture my "WTF" face when I use expose to show all the windows on screen. It doesn't help me either that OS X doesn't stutter at all. It keeps running as if I had only 1 window open.. It's annoying :rolleyes:

    BTW, does that ATI chip come off or is it soldered? If its plugged does anyone think I could pop a better one in? I didn't go that deep in when I opened my laptop so I don't know.
  19. e12a macrumors 68000


    Oct 28, 2006
    GPU and CPU are soldered. If GPU was socketed, i'm sure we would have seen mods by now anyway.
  20. whateverandever macrumors 6502a

    Nov 8, 2006

    I'd recommend instead of just putting a drop on the die / heatpipe and hoping it spreads properly to use a thin spreader of some sort to put a thin layer on the die. That way you know you're going to cover the whole die for good transport and not have it spreading out too far.

    That's the way I did my re-app and it supplied fantastic results.
  21. Kumbi thread starter macrumors newbie

    Apr 7, 2007
    Hey guys, I'm back !

    What do you recommend as a "thin spreader"? I'd prefer anything to a razor blade, I cut myself 3 times while regooping it for the 2nd time, and the temps have only gone down 5 or so degrees....

Share This Page