AMD Ryzen 9 3950X Review

Of an individual silicon atom, apparently. I'd think the "grid size" of silicon crystals might be more relevant, and that's not necessarily the same number... Hmm.

0.235nm between atoms, 1/30th of 7nm. (Though, precisely what does the 7nm number measure?)

Re: AMD Ryzen 9 3950X Review

#5

Post by andy_ppp » Thu, Nov 14, 2019, 2:59 PM UTC

Filligree wrote: post #4

LatteLazy wrote: post #2

7nm is about 35 times the diameter of a silicon atom.

Of an individual silicon atom, apparently. I'd think the "grid size" of silicon crystals might be more relevant, and that's not necessarily the same number... Hmm. 0.235nm between atoms, 1/30th of 7nm. (Though, precisely what does the 7nm number measure?)

Nobody knows anymore, it’s kind of feature size, but everyone defines feature differently!

Re: AMD Ryzen 9 3950X Review

#6

Post by lm28469 » Thu, Nov 14, 2019, 3:00 PM UTC

LatteLazy wrote: post #2

7nm is about 35 times the diameter of a silicon atom.

It sure is, but 7nm in cpu lithography doesn't mean anything, it's pure marketing.

https://en.wikichip.org/wiki/7_nm_lithography_process

> The term "7 nm" is simply a commercial name for a generation of a certain size and its technology and does not represent any geometry of a transistor.

Re: AMD Ryzen 9 3950X Review

#7

Post by awareBrah » Thu, Nov 14, 2019, 3:00 PM UTC

BubRoss wrote: post #3

LatteLazy wrote: post #2

7nm is about 35 times the diameter of a silicon atom.

That's interesting but to put it in perspective I need to know how it relates to a human hair or how many times it can circle the earth.

About the length your hair grows in one second

Re: AMD Ryzen 9 3950X Review

#8

Post by piinbinary » Thu, Nov 14, 2019, 3:03 PM UTC

When GPUs became vastly more powerful over the last ~10 years, it made big neural nets practical. I wonder what an equivalent jump in CPU power will unlock.

Re: AMD Ryzen 9 3950X Review

#9

Post by Scarbutt » Thu, Nov 14, 2019, 3:06 PM UTC

piinbinary wrote: post #8

When GPUs became vastly more powerful over the last ~10 years, it made big neural nets practical. I wonder what an equivalent jump in CPU power will unlock.

More electron apps.

Re: AMD Ryzen 9 3950X Review

#10

Post by shantly » Thu, Nov 14, 2019, 3:08 PM UTC

BubRoss wrote: post #3

LatteLazy wrote: post #2

7nm is about 35 times the diameter of a silicon atom.

That's interesting but to put it in perspective I need to know how it relates to a human hair or how many times it can circle the earth.

If I've used Wolfram Alpha correctly, a 7nm span of silicon circles the earth 5.4874958×10^-16 times at the equator.