AMD Epyc Rome CPUs hold almost 40 billion transistors per chip

by Hilbert Hagedoorn on: 10/24/2019 07:29 AM | source: hardwareluxx | 8 comment(s)

Many ways lead to Rome, and for AMD that means EPYC and perhaps even Threadripper processors with up-to 64 cores per chip. Have you ever wondered how many Transistors there would be on such a chip?

Well, our colleague from hardwatreluxx asked himself the same question adn started some research based on some die-shots from one of their forum members. A Rome CPU consists of 9 dies that are connected to each other for a total area of 1008 square millimeters. This results in a transistor number of no less than 39.54 billion.The previous 'Matisse' Epyc CPU contains much fewer dies and has only 9.89 billion transistors. The impressive number may be due to the new Zen 2 architecture and the 7nm production process as well as that added IO chip.

Comparison of fabrication, size and number of transistors
	The size	transistors
Zen (Zeppelin)	212 mm²	4.8 billion
Zen + (Zeppelin)	212 mm²	4.8 billion
CCD (Matisse & Rome)	74 mm²	3.9 billion
IOD (Matisse)	125 mm²	2.09 billion
IOD (Rome)	416 mm²	8.34 billion
Matisse in total: 2x CCD + IOD	273 mm²	9.89 billion
Rome in total: 8x CCD + IOD	1,008 mm²	39.54 billion

Table Hardwareluxx

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wavetrex
Senior Member

Posts: 750
Joined: 2008-07-16

#5723630 Posted on: 10/24/2019 10:38 AM

This is where the pics are coming from:
https://flickr.com/photos/130561288@N04/

(btw, he just posted a new one with the I/O die... what a beast !)

https://flickr.com/photos/130561288@N04/48949317691/in/dateposted/

Undying
Senior Member

Posts: 12321
Joined: 2008-08-28

#5723633 Posted on: 10/24/2019 10:54 AM

Engineering marvel.

Robson
Junior Member

Posts: 5
Joined: 2019-10-17

#5723716 Posted on: 10/24/2019 02:21 PM

This is where the pics are coming from:
https://flickr.com/photos/130561288@N04/

(btw, he just posted a new one with the I/O die... what a beast !)

https://flickr.com/photos/130561288@N04/48949317691/in/dateposted/

New York 1948

Astyanax
Senior Member

Posts: 4465
Joined: 2018-03-21

#5723720 Posted on: 10/24/2019 02:30 PM

only $8000? I'll take 2.

schmidtbag
Senior Member

Posts: 4653
Joined: 2012-11-10

#5723750 Posted on: 10/24/2019 04:01 PM

only $8000? I'll take 2.

You say that like $8000 is a lot of money for such a CPU. You'll spend over $10k for an Intel CPU with less than half the core count.

Sturmx
Junior Member

Posts: 5
Joined: 2019-02-20

#5724323 Posted on: 10/26/2019 10:53 AM

You say that like $8000 is a lot of money for such a CPU. You'll spend over $10k for an Intel CPU with less than half the core count.

Yeah dude.. $8k or $10k.. Just a drop in the bucket man. Chump change.

schmidtbag
Senior Member

Posts: 4653
Joined: 2012-11-10

#5724345 Posted on: 10/26/2019 02:03 PM

Yeah dude.. $8k or $10k.. Just a drop in the bucket man. Chump change.

It is when you're talking enterprise hardware.

wavetrex
Senior Member

Posts: 750
Joined: 2008-07-16

#5727155 Posted on: 11/04/2019 02:22 AM

Insanely detailed picture of the I/O die (multiple microscope snaps joined together)

Click HERE for the full size image ]
WARNING: 24460 x 13327 pixels, this takes over 1 Gigabyte of RAM to display !!!
Don't blame me if your browser or computer crashes if you want to display it.

Viewed up close looks like a giant industrial area of a future megalopolis, with warehouses and production areas and parking lots and solar panels and such.

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