bad size comparison between Apple A9 and skylake cores

By: Heikki Kultala (hkultala.delete@this.iki.fi), March 12, 2016 5:37 am
Room: Moderated Discussions
Ricardo B (ricardo.b.delete@this.xxxxx.xx) on March 10, 2016 9:35 am wrote:
> Doug S (foo.delete@this.bar.bar) on March 10, 2016 8:03 am wrote:
> > Ricardo B (ricardo.b.delete@this.xxxxx.xx) on March 9, 2016 4:05 pm wrote:
> > > Eg, Apple's A9 core seems to be almost as big as a Skylake core.
> >
> >
> > Measured on what basis? The A9 SoC includes a lot of stuff Skylake doesn't. If you are talking about
> > just the core, where is your demarcation point for what is considered the core? Is cache included,
> > and if so up to what level? How do you account for differences in transistor choices? (i.e. since
>
> Based on available die analysis, Skylake core including
> L2 is ~8.7 mm^2 and A9 cores including L2 is ~6.8 mm^2.

This is not a very good comparison, as
1) Skylake has small L2 caches and always uses L3 cache, but Apple A9 has big L2 cache and works very well without L3 cache. Better comparison would be to include only L1 caches.

2) Intels "14nm" process is considerably denser than TSMC "16nm" process
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