Number of Dies per CPU Hard to Find: Sources for Data?

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WarthogARJ



Joined: 08 Aug 2020
Posts: 4
Location: Sheffield

PostPosted: Sat Aug 08, 2020 2:42 am    Post subject: Number of Dies per CPU Hard to Find: Sources for Data? Reply with quote

Note: I changed to this Forum part from the Modern CPU's issues one.

Hi,
This is my first post after much lurking.
Is an EXCELLENT forum, thanks very much.

I'm looking into CPU behaviour in a holistic manner, and I'd like to know how many dies, and their charactertistics, are in each CPU.
Or at least in the "important" ones.

Many CPUs use several dies to place cache and integrated GPU on, or even onboard memory. And it's often not made using the same process as the main die.

A monolithic CPU die defined as one where everying is on the same physical die, and a heterogenous CPU has several dies, of various process sizes. See attached examples of this from Intel.

CPU World does not list this: the closest it gets is main die size, and sometimes has a CPU photo where you can see that there is more than one die.

The problem is unless you delid the CPU, and know of this from some other source, you don't actually know what your CPU is.

One example of the requirement for this is to classify a given CPU according to Moore's Law type characteristics. See Mark Bohr of Intel's comments on the inconsistency of it on all CPU's <22nm.
[url]https://newsroom.intel.com/editorials/lets-clear-up-node-naming-mess/#gs.c8s5z4[url]

There is a gap in the information provided by sources like CPU World (which is focused on more system specs) and for example that from WikiChip (which covers more fundamental specs).

Any ideas where to find the inormation?

So far, I am needing to hunt it up from random photos of delidded CPU's, and a few teardowns etc. But it's hard going, and very incomplete.

Thanks,
Alan
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frag_



Joined: 17 Nov 2008
Posts: 4015
Location: Estonia

PostPosted: Sat Aug 08, 2020 7:12 am    Post subject: Reply with quote

CPUs with multiple dies from Intel:
Pentium Pro (cpu die and one or two cache dies).
Presler, Dempsey (two 65nm dies)
Kentsfield, Clowertown (two 65nm dual-core dies)
Yorkfield, Harpertown, Tigerton (two 45nm dual-core dies)
Clarkdale, Arrandale (32nm cpu die + 45nm GPU and IMC)
There are unreleased versions with 45nm cpu dies - Havendale and Auburndale, see here: http://www.cpu-world.com/forum/viewtopic.php?t=16355
Haswell-H (or Crystalwell) (22nm cpu die and die with 128MB eDRAM)
Broadwell-H (14nm cpu die and die with 128MB eDRAM)
Skylake-H (14nm cpu die and die with 64 or 128MB eDRAM)
Kabylake-H (14nm cpu die and die with 64 eDRAM)
There are also -G Kabylakes with Radeon RX Vega M and 4GB of HBM2, mcm with three dies.
Coffee Lake U (14nm cpu die and die with 128MB eDRAM)
Knights Landing, Knights Mill - 16GB (8 chips) of DRAM on package.
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Wasmachineman_NL



Joined: 04 Jul 2019
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Location: Netherlands

PostPosted: Sat Aug 08, 2020 8:44 am    Post subject: Reply with quote

Itanium, Penryn-QC/QC XE, Haswell-ULT
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WarthogARJ



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PostPosted: Sat Aug 08, 2020 5:39 pm    Post subject: Reply with quote

Thanks very much.

And I'll post an overall list of what I've found on the Forum.
And maybe it can be added to the database.

I think it's useful information.

In addition, any Westmere CPU's with an Intel integrated GPU have a separate die.
That's on the CPU World website, but is a bit buried.
And it's not mentioned on the CPU database entry.
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svmlegacy



Joined: 15 Jun 2016
Posts: 551
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PostPosted: Sat Aug 08, 2020 8:39 pm    Post subject: Reply with quote

WarthogARJ wrote:

In addition, any Westmere CPU's with an Intel integrated GPU have a separate die.
That's on the CPU World website, but is a bit buried.
And it's not mentioned on the CPU database entry.


Arrandale and Clarkdale, yes, but the 6 and 10 core CPU's (Westmere-EP and Westmere-EX) do not have a secondary uncore die.
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WarthogARJ



Joined: 08 Aug 2020
Posts: 4
Location: Sheffield

PostPosted: Sun Aug 09, 2020 2:38 pm    Post subject: Reply with quote

svmlegacy wrote:
WarthogARJ wrote:

In addition, any Westmere CPU's with an Intel integrated GPU have a separate die.
That's on the CPU World website, but is a bit buried.
And it's not mentioned on the CPU database entry.


Arrandale and Clarkdale, yes, but the 6 and 10 core CPU's (Westmere-EP and Westmere-EX) do not have a secondary uncore die.


Thanks for that: I'm only going by what the CPU World site says about GPU's on Westmere chips. They didn't qualify it anymore.

The CPUWorld site says:
"Westmere Core microprocessors had HD graphics, that was implemented on a separate die, embedded next to the CPU die. The GPU die was manufactured on 45nm technology, while the CPU die was built on 32nm technology."
[url]http://www.cpu-world.com/info/Intel/Features_of_integrated_Intel_HD_graphics_units.html[url]

And now you guys have said which CPU's have multiple dies, I see on CPUWorld that the sizes and number transistors is given for the Westmere cases.

But you really needed to look for them KNOWING they had separate GPU dies.

So how does anyone know this?
Is it documented anywhere?

Especially on the newer Intel CPU's, Intel doesn't even say the die size, or how many transistors anymore.

In fact, to get reasonably complete information on a CPU, I have to go to at least 4 or 5 different sources:
- CompuWorld
- TechPowerUp
- WikiChip
- A review site (if anyone has done one)
- Try to find a photo of a de-lidded CPU

And sometimes the information is different on each site.....sigh.

Alan


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