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 Post subject: Broken CPU
PostPosted: Tue Jan 23, 2018 11:53 pm 

Joined: Mon Jan 22, 2018 9:19 pm
Posts: 3
I have started to pull parts from machines in order to sell and some the CPUs have the heat sink glued on them so well that they don't come off easily. I have tried a few different methods to loosen them but still ended with broken pieces. The CPUs in question are Motorola 68040. Would Boardsort still accept them as CPUs, or would they be counted as something else?

Thanks.


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 Post subject: Re: Broken CPU
PostPosted: Wed Jan 24, 2018 11:23 am 
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Joined: Sat Mar 15, 2014 10:03 am
Posts: 189
i had this question before but did not get a diffentive answer so with that in mind


Motorola 68040? if memory serves those are the cermic ones how big of heatsinks are we talking here ?

post a few pics so we can see


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 Post subject: Re: Broken CPU
PostPosted: Wed Jan 24, 2018 12:24 pm 

Joined: Mon Jan 22, 2018 9:19 pm
Posts: 3
Here's a picture of one of the CPUs with the heatsink attached.

Thanks.


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 Post subject: Re: Broken CPU
PostPosted: Wed Jan 24, 2018 3:18 pm 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 4235
Location: Low DOS
The 6k series generally fall into two categories to begin with. 486 class for the smaller ones with gold cap. Pentium gold cap for the larger ones with the gold cap.
In both cases the whole cou with a sink would fall into Motorola foreign gold cap. For the less common ones without the gold cap they go as Pentium Mac ceramic without a sink, and metal top with a sink.

Broken depends on multiple factors
If it’s fairly large pieces or just a few chips and the cpu is packed together and obviously what it was you’ll get whatever category it was before it broke.

Removing the cpu sink. Chris and others recommended boiling in water. Never tried that myself.
For big ones I’ll bend the fins and blast the sink with a heat gun on the fins.
For smaller ones I stick the sink inside the blower tube of a heat gun and hold it at an angle till the sink falls off. Easy peasy most of the times.

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-- my grades are my own and do not represent an offer from boardsort, nor are they guaranteed. Please keep that in mind.


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 Post subject: Re: Broken CPU
PostPosted: Wed Jan 24, 2018 11:44 pm 

Joined: Mon Jan 22, 2018 9:19 pm
Posts: 3
Thanks LostInLoDOS, that is very helpful. I also just read several of your posts in the Help Forum and got a lot of great information there. This post in particular should be pinned:
viewtopic.php?f=7&t=3049


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 Post subject: Re: Broken CPU
PostPosted: Thu Jan 25, 2018 12:04 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 4235
Location: Low DOS
You’re welcome.
Think the reason we never stickied it was as it’s more a guide.
AMD, ibm, AT&T, And Motorola all have short duration runs that are totally off the wall. The gigantic IBM ceramic Multi chip carriers, those 5 or 6 inch long Motorola’s... AMD made ceramics with nickel caps AND ceramics with palladium and platinum caps, with gold or silver legs. I abandoned that thread when I was met with a platinum cap nickel leg PLASTIC z80 knockoff.
When in doubt ask. :)

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-- my grades are my own and do not represent an offer from boardsort, nor are they guaranteed. Please keep that in mind.


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