[coreboot] [off topic] Opteron CPU missing chips on the bottom

[Timothy Pearson]

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Since you've mentioned the remaining lands are also misaligned, I'd
throw that CPU away.  You currently risk burning out the multiphase
regulator and/or attached peripherals (RAM, PCIe), depending on if the
lands are now misaligned enough to put voltages where they don't belong.

Those lands are very robust; the only way I can think of to chip off one
or two would be putting the CPU land-side up and dropping something on
it.  For more extensive damage, it's possible the CPU was repeatedly
overheated at some point in the past as well.

On 01/31/2018 12:57 PM, Daniel Kulesz via coreboot wrote:
> Hi Taiidan,
> 
>> I purchased a used g34 opteron off of fleabay (sold as working with no 
>> mention of this) and I noticed that it is missing some of the bits on 
>> the bottom and that most of them are crooked, I haven't tried it in my 
>> system yet and I am wondering should return it? or if there isn't any 
>> much risk of it damaging my (expensive kgpe-d16) motherboard and I 
>> should see if it works?
>> I got it for half the usual price....guess I should have asked for photos.
>>
>> I noticed many CPU's sold on ebay have this issue (in those cases they 
>> mentioned it) but I can't understand how it happens, for instance I 
>> noticed a 6386 for sale where they mentioned that it was missing a few 
>> and because of that it doesn't work in a dual socket configuration.
> 
> I have a few Opterons which have this issue and it seems to pretty common. I assume that some "expert" put the CPU on a table before mounting it, and they move it one the table - can't imaging how people manage to chop off the chips otherwise. While some of these damaged CPUs seem to work just fine, I had several which do not recognize more than 1-2 pcs of memory and, thus, would not recommend buying one of these.
> 
> Cheers, Daniel
> 


- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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