Difference between thermal grease and thermal compound?

Discussion in 'Cases & Cooling' started by WdnUlik2no, Jul 2, 2005.

  1. WdnUlik2no

    WdnUlik2no Member

    Joined:
    May 5, 2005
    Messages:
    169
    Likes Received:
    0
    When I originally built my PC, I used AS5 thermal compound for my CPU. Later I bought a ZALMAN ZM-NB47J chipset cooler. It came with some thermal grease, but I decided to use the same AS5 thermal compound that I used for my processor.

    At first my NB temps were in the mid 30's, now for some reason it has shot back up in the low 40's. Should I have used the thermal grease that came with the cooler instead of the thermal compound?

    What is the difference, if any, between a thermal grease and thermal compound?

    Current temps:
    CPU: 30C
    NB: 42C

     
  2. BillyBobJoel71

    BillyBobJoel71 Platinum Member

    Joined:
    Mar 24, 2005
    Messages:
    2,611
    Likes Received:
    0
    no difference, just the difference is what the compound is made of.
     
  3. imported_Kensai

    Joined:
    Nov 11, 2004
    Messages:
    10,861
    Likes Received:
    0
    AS 5 > Whatever else. (To my knowledge)
     
  4. BillyBobJoel71

    BillyBobJoel71 Platinum Member

    Joined:
    Mar 24, 2005
    Messages:
    2,611
    Likes Received:
    0
    :)
     
  5. lobadobadingdong

    Joined:
    Aug 27, 2002
    Messages:
    10,045
    Likes Received:
    0
    good temps there, only way to cool your nb any more with passive cooling is to cut your own (using either a dremel or jewelers saw) from a larger (or different material) heatsink to fit (and use thermal glue)

    I've been contemplating that with an older heatsink I bought with my 933Mhz P3
     
  6. Zepper

    Zepper Elite Member

    Joined:
    May 1, 2001
    Messages:
    18,998
    Likes Received:
    0
    Heatsink grease = heatsink compound, just easier to say grease - more professional to call them TIMs (thermal interface materials, grease type or pad type). TIMs like AS5 can settle out after a while of sitting on a shelf or in a drawer - need to resuspend the compound by GENTLY mixing with a CLEAN plastic tool (wipe it down good with alcohol and let dry). Gentle as you don't want air bubbles - CLEAN as you don't want any foreign particles in your AS5. That may be your problem - that your AS5 had settled out prior to your use. Another possibility is that the AS5 was squeezed out due to pumping from thermal cycling - a drawback of most greases. But that is unlikely as NBs generally don't generate very high temps.
    . Other compounds are pretty much equal to AS5 (e.g. Shin Etsu, Nanotherm, et al.)- even Shin Etsu pads come close enough (within a degree or two) and are MUCH easier to apply than most greases. Ajigo.com (which makes most of AMD's retail HSFs) sells the Shin Etsu pads (gray) and they are also sold under the Akasa name and I've seen Honeywell pads (pink) on eBay. But greases are better for NBs as NBs usually don't get high enough temp to achieve the phase change needed by the pads. Pads are better for CPUs. But the Honeywell pads do have a fairly low PC temp, so they may work OK on NBs.

    .bh.
     
  7. NetZeroZeus

    NetZeroZeus Member

    Joined:
    Jul 2, 2005
    Messages:
    37
    Likes Received:
    0
    Would it be possible to buy a passive NB cooler liek the Zalman NB47J and mod it so you con put a 40mm fan on it?
    Are there any copper NB coolers out there?