Best way to apply thermal compound to 2010MP upgrade

Discussion in 'Mac Pro' started by SDAVE, Mar 28, 2015.

  1. SDAVE macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #1
    I searched and people seem to be doing the pea-sized ones with spreading it with a credit card and sometimes not spreading it. I tried both and it seems that I idle about 55-60c for dual x5680s 12core. I have to use iStat menu to up the intake/exhaust & cpu cooler fans to get it down to 42c idle.

    Should I reapply the paste with the X diagonal spread with my arctic silver 5?


    Cheers
     
  2. AndreeOnline macrumors 6502

    AndreeOnline

    Joined:
    Aug 15, 2014
    Location:
    Zürich
    #2
    If you look at my mod thread, under CPUs item 4 I have a direct link to Arctic Silver's pdf with their instructions.
     
  3. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #3
    Don't overthink this. As long as IHS is fully covered with the compound and its layer isn't too thick, you're good to go. No matter which method you'd use.
     
  4. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #4
    Nice I think I followed the AS pdf...

    I tried 2 approaches so far, and they're both equal in terms of thermal compounds.

    One is peasized just dabbed on and allowed heatsink to flatten it. The other was peasized and then spread across with no bubbles with a credit card.

    Do you guys think I should use another compound? AS (reading online) seems that they dry too fast.

    I'm open to re-applying I just want a surefire method this time. I don't think 55-60c is good for idling at Mac Pro default fan speeds.

    I also think I scratched the heatsink surface a bit so maybe there are bubbles??
     
  5. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #5
    AS needs curing time (see specs for how long it should be, I don't remember now) to get its full performance. There's a few other Arctic products which do not require curing. I'm recently using MX-2, because I didn't see the difference between its newer versions (MX-3, MX-4). According to MX specs, it should last 8 years, while AS less than 5 IIRC.
     
  6. Larry-K macrumors 68000

    Joined:
    Jun 28, 2011
    #6
    I used the Apple technician's manual technique, seems to work fine.
     
  7. AndreeOnline macrumors 6502

    AndreeOnline

    Joined:
    Aug 15, 2014
    Location:
    Zürich
    #7
    Yes, AS states around 200 hours burn in (but that means normal operation, no need to benchmark or anything like that).
     
  8. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #8
    I see, I've been using AS since like early 2000 when I used to build PC's and use large heatsinks. Never had a problem.

    I do have the MX2 I think somewhere laying around, should I use that instead?

    I don't get what they mean here, do they mean just fill that whole area or just a straight line in the middle?
     

    Attached Files:

  9. AndreeOnline macrumors 6502

    AndreeOnline

    Joined:
    Aug 15, 2014
    Location:
    Zürich
    #9
    As you see in the AS guide, the IHS covers a lot more area than the underlying cores. Still assuming that the IHS does its work and distributes the heat, you'll want a thin even layer over the entire IHS.

    The guide you show means that you should apply just the thin line and the circle. The preassure of combining the heatsink with the IHS will automatically distribute the compound.

    You will want the long thin line of paste to be oriented correctly. See AS guide for reference.
     
  10. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #10
    The Apple guide means clean up the CPU surface, and apply the thermal paste like a stop sign (N.B. the CPU is rotated in 90 degree).

    Anyway, the method of applying thermal paste isn't that important. Tests show that the difference usually within 1 degree, that's well within normal variation.

    If you try different method and still get more or less the same number. That should be something else to cause the high idle temp. e.g. Poor air flow, high ambient temp, etc.
     
  11. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #11
    Ah so just draw with lines...I thought fill the line or do a line and spread around :)

    The machine is out in the open, room isn't that hot. I kicked up the fans in iStat menu so they are a bit audible now, but I'd like to turn off iStat menu and leave it as it is, but the speeds jump up too much.

    Weren't the x5680s and 90s never supported? since the TDP was so high on them. I wish i had the x5690s though to max this machine out...these CPU's are so speedy (they are about 5 years old now).

    I also have a GTX780 in this machine so I assume that's also causing some heat even at idle.
     
  12. Gav2k, Mar 29, 2015
    Last edited: Mar 30, 2015

    Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #12
    I've never used a credit card. I've put a tiny amount on, half pea size then put a glove on (medical type) and spead the paste over the core. The only time I'd use a pea size amount is on a for with ihs installed.
     
  13. Demigod Mac macrumors 6502a

    Joined:
    Apr 25, 2008
    #13
    It will spread on its own when pressure is applied from attaching the heatsink. Don't need to flatten it out (can actually introduce more air bubbles and debris this way)

    https://www.youtube.com/watch?v=-hNgFNH7zhQ
     
  14. pertusis1 macrumors 6502

    Joined:
    Jul 25, 2010
    Location:
    Texas
    #14
    Would you mind posting the full set of your temperature numbers from iStat? They can sometimes be confusing, and I'm wondering if you are actually idling that hot.
     
  15. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #15
    A small dab and spreading with a credit card has always worked well for me.

    Lou
     
  16. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #16
    This is with about 65-75% CPU usage. And I have manually increased the CPU fans and intake/exhaust to a point where it's fairly audible.

    I think I just have to reapply, somethings definitely wrong.
     

    Attached Files:

  17. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #17
    The method I have used for decades is to put a small amount on both surfaces and use a credit card to sweep it full across in both the x and y directions to fill the micro-pits in the metal, leaving as thin a film as possible ... then mate the parts and secure with whatever clips, screws, clamps are involved. The parts must be clean before starting.

    This hasn't let me down yet!
     
  18. SDAVE, Mar 29, 2015
    Last edited: Mar 29, 2015

    SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #18
    So it looks like i made a doodoo and I accidentally swapped the heatsinks so CPU A and CPU B were using the wrong heatsinks!

    Cleaned everything up and just applied a pea-sized amount in the middle of CPU and followed instructions in 2010MP service manual of screwing the heatsink via 1,2,3,4 screws (X) and all is ok now. I removed iStat and it's idling at around 40C for both CPUs (one is a few C's off but that's understandable.)

    Anywho thanks guys for the help!

    Also after removing iStat menu the CPU is around 81C at 80% load. MPro just automatically handles it. Ok tired of the technical stuff, now back to work :)

    Current temps at 80% load. Are these good? It can run at these temps and fan speeds all day long.
     

    Attached Files:

  19. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #19
    That's a new one on me:eek: I've never seen that recommended. Seems like to much paste.

    Lou
     
  20. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #20
    Does anyone have a similar setup they can post the idle temps and 80+% usage temps?

    Mine are like this at idle now, it fluctuates. I don't know why CPU B and CPU A are so different. I applied AS the same way. Maybe I should let them burn in 200 hours.
     

    Attached Files:

  21. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #21
    Difference between A and B is perfectly normal. See how CPUs are located on dboard and you'll understand ;)
     
  22. SDAVE thread starter macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
    Location:
    Nowhere
    #22
    So these look ok to you?
    Don't the CPU's burn out at different times? :)

    I don't care though, this machine will probably sold soon anyway. It's too big :D

    But it's a beast nonetheless....
     
  23. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #23
    You need to fill the micro-pits from the machining on both surfaces. The film you leave is really thin, just a "molecule" thick film is all you need. The "goup" you see in the disassembly pictures posted here is way too thick, but probably lends itself to fast mass-assembly.
     
  24. Edzson macrumors newbie

    Edzson

    Joined:
    Dec 18, 2014
    Location:
    Goodyear, AZ
    #24
    I'm about to upgrade my 4core 1,1 to an 8core. Here is a good youtube video I found. He uses your method to fill the micro-pits on both surfaces.

    https://www.youtube.com/watch?v=wmz7gPw31L0
     
  25. andrewhelmus macrumors newbie

    Joined:
    Mar 24, 2015
    Location:
    Central FloriDUH
    #25
    Can anyone elaborate on the best technique for CPU's that have the IHS removed? I just purchased a pair of x5690's for my upgrade, and I spent a little extra money to get a pair that have the IHS removed. I'd imagine that a small dot of thermal paste directly on the die would be best..

    Andrew
     

Share This Page