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Threadripper CPU Opened and Dies Examined

Category: CPU's
Posted: 12:21PM

At this point, if you have been following what AMD has been doing with its CPUs, you may know the entire stack of CPUs, from Ryzen 3 to Threadripper and Epyc, are all using the same Zeppelin die, with binning deciding where the dies. Those Zeppelin dies feature eight cores between their two core complexes (CCXs), 32 PCIe 3.0 lanes, and dual-channel memory support. By disabling cores we get the six core and four core parts, but by leveraging Infinity Fabric, AMD is able to combine multiple dies to create the Threadripper and Epyc chips, with up to 32 cores, 128 PCIe 3.0, and eight-channel memory. Some quick math there shows the Epyc chips are using four Zeppelin dies, and with Threadripper having 16 cores, 64 PCIe lanes, and quad-channel memory support, it uses two dies. When it was discovered Threadripper chips are hiding apparently four dies under the IHS, there were questions about the status of those other two dies, so der8auer decided to take a (second) look on his YouTube channel.

Initially der8aurer had put up a video where he delidded a Threadripper to find these four dies, but was asked to take it down for a bit, as the chip he used was an engineering sample. Now he has a new video up because there have been some claims that two of those dies are 'dummies' and are just spacers, even blank silicon. This time, instead of just popping off the IHS, der8auer went further to remove the dies from the packaging and then remove layers from the die to see if there were circuits underneath.

It turns out those claims of the dummy or blank dies are apparently false, as all four dies der8auer pulled out did in fact have circuitry in them; they are not dummies. They are definitely disabled though and likely defective, because why would you waste a usable die or silicon?



Source: der8auer YouTube

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cjloki on September 17, 2017 11:37

i watched the whole vid and ok , it was kinda long and tedious imho,...but now we know there are no fake dummy dies in a threadripper,...1000 euros down the drain...

cjloki on September 18, 2017 03:09

i guess i'm late to the game again but i was just doing some comparison shopping on the newegg and i see that the 8 core 1900x is the only one listed, that is equipped with the "virtualization technology", and i'm asking myself why...

..seems like kind of a waste to create a new socket, package, and platform, and not include all of the bells and whistles...or maybe it's just a typo ? 

is there some reason why the two big brothers are not given the virtualization ??

Guest_Jim_* on September 18, 2017 18:17

Chances are Newegg just does not have complete listings for the other parts. I just looked the comparison of the 1900X and 1950X, and it does not even identify the 1950X is 64-bit. Checking the AMD product page though does list "Virtualization" under the key features of the 1950X.

Because of how AMD has designed the Ryzen 3/5/7, Threadripper, and Epyc platforms, I am pretty sure there is no feature that is not common across a platform. If one part in the same platform has it, every part in that platform has it. The Ryzen 3 CPUs do not list Virtualization under key features though, but that might just be because they are only 4-thread parts, so while the special virtualization technologies might be in there, you probably would not want to virtualize with it.

cjloki on September 20, 2017 00:54
ahh ok guest-jim,...i will go have a look on the amd website...thanks !

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