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Guru3D.com » News » AMD James Prior Sheds Light on Threadripper Dummy Dies

AMD James Prior Sheds Light on Threadripper Dummy Dies

by Hilbert Hagedoorn on: 09/19/2017 08:53 AM | source: | 23 comment(s)
AMD James Prior Sheds Light on Threadripper Dummy Dies

AMD's Senior Product Manager, James Prior talked a bit about the story that broke earlier on last week related to the fact that Threadripper is fitted with four AMD Zepplin dies. He mentions that the two extra dies have "no path to operation".

That also means you cannot activate 32-cores of course and that EPYC is a different processor (but sharing the same design). Prior outted his remarks on twitter:

Threadripper is not a Epyc processor. Different substrate, different dies. 2 dies work, other 2 have no path to operation. Basically rocks.

Prior also added that AMD decided to use the term "dummy" instead of "inactive" to describe Threadripper's additional dies as there is no way of utilizing/activating these additional CPU dies.

Yes, exactly why they're not described as inactive, but dummy. Doesn't matter if they were dead, or active, they're not going to work.

Earlier on overclocker der8auer tried to de-lid a Threadripper, but with the heatspreader soldered to the dies he broke that CPU (of course). In his video he took it a step further and check out the dummy dies. When he pealed them loose, the four dies revealed themselves, opposed to some sort of two die / two dummy configuration. James Prior however still has not mentioned as to why exactly they are using two extra dies? But likely, the ones used did not pass wafer inspections, e.g. they are non working dead and thus re-used



AMD James Prior Sheds Light on Threadripper Dummy Dies AMD James Prior Sheds Light on Threadripper Dummy Dies AMD James Prior Sheds Light on Threadripper Dummy Dies




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Dragonstongue
Junior Member



Posts: 18
Joined: 2017-09-19

#5473274 Posted on: 09/19/2017 09:29 AM
just because there is no connections, does not mean it wasnt EPYC with laser cut to disable, not the first time any cpu/gpu have done exactly this LOL.....he is basically just saying "cannot enable the 2 dies because they have been disabled/cut" shame they couldnt optimize a hair further to pick the best of the dies of the 4 available for lowest leakage/highest speed possible and use that extra space for embedded vapor chamber or something along those lines as they are anything but low cost parts, seems a bunch of wasted space for a wonking huge cpu to me ^.^

fry178
Senior Member



Posts: 1920
Joined: 2012-04-30

#5473278 Posted on: 09/19/2017 10:00 AM
@Dragonstongue.
ZERO difference.
If "your" dead, it doesn't matter if it was of old age/accident or anything else, as end result is still the same...

"you" only disable cores etc if market demand is high AND you have good yields.
dont see this with zen, as they started releasing the lower core (amount) cpus first,
as to gain stock on hand for TR or maybe even 1xC on X370

RmVA
Member



Posts: 34
Joined: 2016-05-25

#5473304 Posted on: 09/19/2017 01:16 PM
So the threadripper-dummy is dead?

RIP

JamesSneed
Senior Member



Posts: 1653
Joined: 2017-02-14

#5473310 Posted on: 09/19/2017 01:38 PM
Finally, I will sleep better knowing the truth.

D3M1G0D
Senior Member



Posts: 2068
Joined: 2017-03-10

#5473311 Posted on: 09/19/2017 01:40 PM
Just as I had thought. AMD called them dummy dies to make it clear that there was no way to activate them.

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