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m (Die size Estimation Response)
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In an effort to ensure accuracy on WikiChip, I'm wondering where did those dimensions come from?
 
In an effort to ensure accuracy on WikiChip, I'm wondering where did those dimensions come from?
 
Thanks --[[User:David|David]] ([[User talk:David|talk]]) 19:56, 15 December 2017 (EST)
 
Thanks --[[User:David|David]] ([[User talk:David|talk]]) 19:56, 15 December 2017 (EST)
 
== Die size Estimation Response ==
 
 
The die dimensions are estimated through knowing die size (Xmm2) and physical die height and width relative each other, I will give you "Zen-Ryzen" die example;
 
 
Ryzen Die Size 213mm2 which is AMD's number, so I assumed it is correct, then I took the picture of die from the wikichip, https://en.wikichip.org/w/images/thumb/3/3f/amd_zen_octa-core_die_shot.png/950px-amd_zen_octa-core_die_shot.png
 
 
and actual die shot after the delid of the Ryzen CPU,
 
 
https://farm5.static.flickr.com/4353/35620962953_8a12c79f69_b.jpg
 
https://www.overclockingmadeinfrance.com/wp-content/uploads/2017/09/RyZen-Die-Shot-3.jpg
 
 
and I measured the width and height by pixels, (2nd picture 1024x448 pixels flickr one),
 
1024/448 = 2,2857~ so wide side is "2,2857a" narrow side is "1a"
 
so mathematical equal of 213mm2 is 2,2857a X 1a = 213, 213/2,2857 = a x a = 93,188~ so a = 9,6534~ then multiply a with 2,2857 and 1 for getting dimensions
 
~22,06 x 9,65 = 212.9 the dimensions I got, of course actual dimension require direct measurement, but mathematically this is pretty close "estimated" die size dimension, also thats why I used "~" symbol to mention that. I hope that helps how I did this estimated die sizes.
 

Revision as of 22:30, 16 December 2017

Die sizes

Hello Dahaka88, You've recently added a number of die dimensions to a number of microarchitectures such as Zen, Skylake, and Coffee Lake. In an effort to ensure accuracy on WikiChip, I'm wondering where did those dimensions come from? Thanks --David (talk) 19:56, 15 December 2017 (EST)