Motherboardectomy: how to un-bond the CPU's heatsink?

[dennis]

Modern cpus all have heat shields on them so I'd be more worried about he pins than the die.  Have you tried rotating the cpu/heatsink in opposite directions (like you were unscrewing it)?  That's usually all i've had to do to get them unstuck, even when I've managed to pull the cpu out of the locked zif socket.



-Dennis





---- On Thu, 07 Jul 2016 22:30:35 -0400 Star <nhstar at gmail.com>wrote ---- 




I've used the dental-floss trick, well, actually, thin fishing line.  It worked well enough without the alcohol, it was just a slow, steady process.



On Thu, Jul 7, 2016 at 10:06 PM Joshua Judson Rosen <rozzin at hackerposse.com> wrote:




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Bought a nice CPU a while back, with a cheap motherboard to put it onto

 until I found something better (in retrospect, that was probably silly...).

 

 Finally found a better motherboard, and am now reminde that

 (a) now I need to get the heatsink off of the CPU in order

 to transfer the CPU between the ZIF sockets (since the socket lever

 is covered by the heatsink), and (b) baked thermal paste is

 a remarkably good adhesive.

 

 Somewhat surprisingly..., the CPU is out of the original socket

 at this point--it popped out while I was fiddling with the heatsink.

 I'm going on the assumption that nothing got broken in the process,

 for the time being....

 

 Any suggestions on what the right course of action is, here?

 

 Wikihow advises to soak the CPU+heatsink assembly in isopropanol

 and then slicing them apart with dental floss.....

 

 

 --

 "Don't be afraid to ask (λf.((λx.xx) (λr.f(rr))))."

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