Processor cooling ::

badtzbadtz
Posted:
in Current Mac Hardware edited January 2014
on the towers, how are the g4 processors [dual gig?] cooled? are they cooled via the traditional heatsink & fan method?



pictures?



just curious as to the method on the towers vs. the cube....



also, is it okay to put thermal paste along the WHOLE top of the cube's processor? how about the sonnet duet?

Comments

  • Reply 1 of 18
    eugeneeugene Posts: 8,254member
    Yes, they use a heatsink and fan combo.



    You only want to put a paper thin amount of paste on the raised portion of the CPU...the shiny square part.
  • Reply 2 of 18
    macaddictmacaddict Posts: 1,055member
    Not even paper thin. Should be even thinner than that...like nearly transparent. However, if the heatsink clamps on, it will probably squeeze out the proper amount of TI grease. Not sure how the G4's heatsink is mounted though.



    Since when did Apple put fans on top of their heatsinks? My G4 400 is passively cooled...
  • Reply 3 of 18
    badtzbadtz Posts: 949member
    anyone with pictures of the heatsink/fan in a G4 tower? [quicksilveR?]
  • Reply 4 of 18
    ghost_user_nameghost_user_name Posts: 22,667member
    Direct from apple.com:







    See that huge stack of silver on the bottom-right? That's the heatsink. It's big.



    See that fan right above it? That pushes air around the inside of the case. It's loud.



    another pic:







    [ 06-12-2002: Message edited by: starfleetX ]</p>
  • Reply 5 of 18
    eugeneeugene Posts: 8,254member
    [quote]Originally posted by radar1503:

    <strong>Not even paper thin. Should be even thinner than that...like nearly transparent. However, if the heatsink clamps on, it will probably squeeze out the proper amount of TI grease. Not sure how the G4's heatsink is mounted though.



    Since when did Apple put fans on top of their heatsinks? My G4 400 is passively cooled...</strong><hr></blockquote>



    Uh, heh...I know for a fact that it shouldn't be as thin as you describe. I don'tknow what kind of paper you use, but 'paper thin' seems to be a pretty good gauge. When I pop off the heatsink, I get those nice little peaks and valleys and it's evenly spread...and no excess goop squeezed onto the ceramic.
  • Reply 6 of 18
    badtzbadtz Posts: 949member
    the air is blown ONTO the heatsink then?



    what size fan?



    *thanks for hte pix links*
  • Reply 7 of 18
    outsideroutsider Posts: 6,008member
    The fan is a 60mm and 25mm thick. I found some ducumentation on the fan model# and it pushes 22 cubic feet of air per minute. Not bad for a 60mm.
  • Reply 8 of 18
    badtzbadtz Posts: 949member
    it's only 25cfm? hmmm



    any decibel specs?
  • Reply 9 of 18
    outsideroutsider Posts: 6,008member
    it's on the high side. 36dB I think.
  • Reply 10 of 18
    badtzbadtz Posts: 949member
    Yikes! I'm sure there's a papst fan that's lesser & better than that!
  • Reply 11 of 18
    outsideroutsider Posts: 6,008member
    Well here are a couple but they are not much better.



    <a href="http://www.plycon.com/fans60.htm"; target="_blank">http://www.plycon.com/fans60.htm</a>;
  • Reply 12 of 18
    cdhostagecdhostage Posts: 1,038member
    I hope the next PM is cooled by



    <a href="http://www.coolchips.com/"; target="_blank">http://www.coolchips.com/</a>;
  • Reply 13 of 18
    macaddictmacaddict Posts: 1,055member
    From Arctic Silver's instruction page:

    <a href="http://www.arcticsilver.com/arctic_silver_instructions.htm"; target="_blank">Link</a>



    [quote]Stock processors and/or heatsinks with normal surface irregularities will require a layer 0.003" to 0.005 thick as shown below to fill the resultant gaps. (Equal to the thickness of about 1 sheet of standard weight paper.) Properly lapped heatsinks with mirror finishes will only require a translucent haze.<hr></blockquote>



    Guess it depends on how nice the heatsink is.



    BTW, so I guess the G4 does *not* have a CPU fan? I know it has a big case fan, but I don't see any CPU fan in those pictures...



    [ 06-12-2002: Message edited by: radar1503 ]</p>
  • Reply 14 of 18
    splinemodelsplinemodel Posts: 7,311member
    Get a sleeve bearing fan. These babies are quiet. I have some in "Meatloaf," my tricked-out 7500, and it's very quiet. I also mount all of my fans and drives on HVAC foam-rubber gasket/sealant. Get it at Home Depot.



    <a href="http://www.princeton.edu/~jnorair/whoiam/procon.html"; target="_blank">Meatloaf</a>



    [ 06-12-2002: Message edited by: Splinemodel ]</p>
  • Reply 15 of 18
    badtzbadtz Posts: 949member
    yeah....



    my plan is to cool my cube with a papst 12db sleeve bearing fan
  • Reply 16 of 18
    eugeneeugene Posts: 8,254member
    The original fan on my dual 1 GHz's heatsink is a Sunon KDE1206PTV1. It's rated for 23.5 CFM at 33.5 dBA. The fan I replaced it with is a Sunon GM1206PTVX-A which is rated for 26.2 CFM at 38 dBA. it does not sound noticeably louder though. I lapped all my heatsinks to a mirror shine with 3000 grit sandpaper. I haven't done the latest one because I don't have any sort of a thermalcouple hooked up...I don't want to risk increasing the junction temps by accident.
  • Reply 17 of 18
    badtzbadtz Posts: 949member
    are those sunon fans 60mm?



    if 80mm...



    panaflo & papst makes comparable cfm fans, with A LOT less decibels
  • Reply 18 of 18
    eugeneeugene Posts: 8,254member
    They're 60 mm. Papst makes some loud fans too, not just quiet ones. I have a Papst 30-something CFM 60x25 fan that sounds like a jet engine.
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