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Stuck heat sink

  • CPUs
  • Heat
  • Thermal Compound
Last response: in CPUs
April 27, 2007 12:22:38 AM

I was replacing the 939 cpu in my wife's computer. When I tried to remove the old cpu I could not get the heat sink off. It was stuck to the cpu. I wiggled it and it still would not come off. I pulled and the entire cpu came out of the socket and was still stuck to the heat sink... 8O

Well to make a long story short I put the new cpu in and it works great. :D 

My question is why did the thermal paste glue the cpu to the heat sink? I used arctic silver 5 thermal compound. This cpu had been on the same board for approx two years.

Did I use too much paste? (temps were fine)......or should I turn the computer on and let the cpu heat up and soften the paste before removing next time?

I have never had this happen before and was just wondering if anyone else ever had this happen and what can I do to prevent this from happening in the future.

Thanks.... :wink:

More about : stuck heat sink

April 27, 2007 12:31:56 AM

AS5 drys out after a while. Are you sure it was regular AS5, and not Arctic Thermal Adhesive?
April 27, 2007 12:35:15 AM

I got it at radio shack. :lol: 

On the tube it says

Arctic Silver 5
high density
polysynthetic silver
thermal compound

After sliding the cpu off the heat sink I was able to wipe the stuff off with a cloth. It was soft and sticky.
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April 27, 2007 1:13:27 AM

LOL I did that once ...............................Idiot.
April 27, 2007 1:15:20 AM

I've never actually seen AS5 do this before.... :?

Of course, I've never let AS5 go for 2 years either.....

By nature most thermal pastes dry out and "bake on" to the heatsink/processor. To prevent the sticking together, first run the computer for a few minutes, then turn it off and remove the heatsink quickly. As the paste is still warm, it will be easier to remove.

Best of Luck
April 27, 2007 1:15:33 AM

Is that a cat-shark or shark-cat?
April 27, 2007 1:31:25 AM

Both at the same time

No, I didnt understand what I just said neither
April 27, 2007 1:45:13 AM

I've found it comes off easier if you run the machine first and get it warm, then shut down and remove it.
Cat-sharks are vicious as they hate being wet, yet die if they aren't in water. Very angry, confused creatures.
April 27, 2007 1:46:43 AM

Next time use a crowbar.
April 27, 2007 1:53:12 AM

Next time use a crowbar.

NO you noob.

dynamite :p 
April 27, 2007 1:58:43 AM

LOL I did that once ...............................Idiot.

Isn't that stuff a two part epoxy? How do you "accidentally" mix up a batch of epoxy? 8O :lol: 
April 27, 2007 1:59:38 AM

Is that a cat-shark or shark-cat?

Do not provoke it.
April 27, 2007 2:01:01 AM

Is that a cat-shark or shark-cat?

No it's a PussyFish.
April 27, 2007 2:03:45 AM

It's ahhh.... It's ahhh.... It's ahhh.... It's ahhh.... putty tat with a big mouth practicing it's back stroke...

<--hears in the back ground..

bubble beach blonde . o O <(Oh look at the dolphin, look at the pretty dolphins.. hehehe, lets go play with him)
April 27, 2007 2:36:59 AM

A cat that is swallowing a shark........or a shark giving a cat a piggy back ride.


And you thought it was safe to go back into the water.

Now does it use a sand box or a water box to do its business......

Check out link.....does not look like picture...strange......
April 27, 2007 2:55:27 AM

Hmm the one I used wasn't, A friend gave it to me when I was like 14 and said use this, hate that guy.

Dont know what you call the avatar but is sure eats a lot of fish.
April 27, 2007 2:58:54 AM

Everyone knows to soak it in paint thinners or petrol(gasoline) overnight to dissolve the AS5, DUH
April 27, 2007 3:06:12 AM

thats normal with AS5. To remove those, unclip the heatsink, give it a few twists to break the bonds between heatsink and cpu. Pick heatsink up and take cpu out. Be sure to properly clean the AS5 off of the heatsink/cpu if you plan on re-using it again.
April 27, 2007 6:30:13 AM

turn off the fan and let it get real hot - that will soften the paste
April 27, 2007 8:31:14 AM

but... wouldnt the cpu get too hot ?

i was always scared of doing that because the cpu might not give all its heat away immediately
April 27, 2007 9:30:54 AM

Unfortunately that is how the 939 cpu's come out,heatsink and all.No worries though mate,I've removed several 939 cpus and replaced them with newer and faster cpu's.The trick is to pull it straight out so you do not bend any pins.If a pin comes off however,you are kind of S.O.L.However,pins seldom come off the cpu.Trust me on this ok,I know what I'm talking about here.Goodluck.


AMD X2-4400+@2.6 TOLEDO
3DMARK05 13,471
April 27, 2007 10:46:57 AM

lol.... yeah... of course i was jokin :oops: 

:D  helps to know that isnt true lols !!
a b à CPUs
April 27, 2007 11:50:37 AM

I heat up the heatsink and remove it using a twisting motion. My CPU stays put. I have not had any problems using this method.
April 27, 2007 1:22:24 PM

Thanks all.....yea I was thinking that I should have warmed the heatsink and then tired to remove it (of course this occured to me after the fact). I'm just happy I didn't ruin the mother board and cpu.