AMD moves to 7nm

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Message 1963711 - Posted: 7 Nov 2018, 6:17:04 UTC

Next generation Epyc CPUs called Rome.
AMD EPYC ‘Rome’ processor will carry multiple CPU chiplets manufactured using TSMC’s 7 nm fabrication process as well as an I/O die produced at a 14 nm node. As it appears, high-performance ‘Rome’ processors will use eight CPU chiplets offering 64 x86 cores in total, as well as an eight-channel DDR4 memory controller supporting up to 4 TB of DRAM per socket. Besides, the new processor supports 128 PCIe 4.0 lanes...

Floating point performance per core is claimed to have doubled, resulting in per socket performance quadrupling.


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Message 1963712 - Posted: 7 Nov 2018, 7:07:52 UTC - in response to Message 1963711.  

Haven't seen any in depth analysis of Zen 2 architecture yet, just the broad strokes so far. I did catch the slide that showed the FPU register width doubled from 128bit to 256bit wide. So improvements just on that for floating point performance. Supposed to be lots of reengineering of the instruction scheduler to give again improved IPC performance outside of the general benefits of the feature size shrink to 7nm.
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Message 1963735 - Posted: 7 Nov 2018, 15:27:05 UTC - in response to Message 1963711.  
Last modified: 7 Nov 2018, 15:27:27 UTC

I very much like the chiplets idea. Excellent for improved yield and for great flexibility.

Here's hoping AMD can further leap ahead without any spoilers and vandalism from any anticompetitive stupidity from others...


Happy fast cool crunchin'!
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Message 1963850 - Posted: 8 Nov 2018, 4:22:29 UTC
Last modified: 8 Nov 2018, 4:23:29 UTC

So the question in my mind becomes how long before this siphons down to the consumer level chips?

It would be really "neat" if I could get a 2990WX-like chip with direct access to memory from all its cores like the server versions of this chip already do, but at a consumer level price, not an enterprise price.

Oh, no. My 2990WX is "already" obsolete! (But still being produced :)

:) :) :)

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Message 1963853 - Posted: 8 Nov 2018, 4:45:36 UTC - in response to Message 1963850.  

My best guess is Q4 2019 for consumer 7nm parts.
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Message 1965031 - Posted: 13 Nov 2018, 22:38:56 UTC - in response to Message 1963853.  

My best guess is Q4 2019 for consumer 7nm parts.


So we might get some kind of Threadripper 3 in the 2990WX by then?

I wonder, will the threadripper3 in 7nm cpus need a need a new MB socket or will we have the same direct access to memory issues the 2990WX has now?

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Message 1965033 - Posted: 13 Nov 2018, 22:42:01 UTC - in response to Message 1965031.  

Zen 2 on 7nm is said to keep the same socket. Zen3 is said to offer two different platforms. First will keep the same socket and then another socket to support DDR5 and DDR6. Zen 3 isn't till 2020.
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Message 1968904 - Posted: 6 Dec 2018, 0:25:42 UTC

I was reading about rumors on the AMD Ryzen 3000 series.

From a straight ahead all the CPUs have direct access to memory ideal its seems like it would be a better buy for Seti CPU crunching than the 2990WX appears to be.

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Message 1969009 - Posted: 6 Dec 2018, 21:13:01 UTC

I was just reading ExtremeTech's debunking of the Ryzen 3000 rumors. I think the article makes some cogent points that the rumors are false. I can't see the chiplet design of Rome making it into the Ryzen product line. Not unless you changed the socket. If doing that, you would just be using the Socket SP3r2 of Threadripper. So what is the point. There just isn't enough room in the package to put a 14nm I/O die alongside 2 or more "chiplet" dies. And also including a Navi gpu die in the "G" SKU's is laughable. And the posted MSRP price points also unbelievable.
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Message boards : Number crunching : AMD moves to 7nm


 
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