OK,I looked at some measurements for the cores.
From TH:
https://www.tomshardware.com/uk/news...ionic-revealed
So a 2C/2T FireStorm core on 5NM is 9.1MM2 it appears. TSMC 5NM is apparently upto 80% denser than TSMC 7NM:
https://www.kitguru.net/components/c...ensity-vs-7nm/
So despite the "large 4MB L2 cache" the process node is much more denser than 7NM. The A14 is 11.8 billion transistors on TSMC 5NM and is around 88MM2. Renoir is 9.8 billion transistors and is 156MM2.
From Reddit:
https://www.reddit.com/r/Amd/comment...t_6_comparing/
Each Zen2 core is around 2.83MM2. The 512KB L2 cache is 0.81MM2. So that comes to around 7.28MM2 on a less denser TSMC 7NM.
25% larger surface area on a much higher density node. Also there is spacing considerations with Zen2/Zen3,ie,as they run at higher clockspeeds and voltages,to have the heat distribution more even. Each Zen2/Zen3 core will have an additional small area penalty due to the use of SMT.
If you look at Zen3 compared with Zen2,the chiplet is around 10% larger apparently:
https://twitter.com/chiakokhua/statu...67162968371200
So if that is mostly down to the cores getting larger,its still smaller per core(in transistor count) than the A14 on a less denser process node.
The warranties are short on the iPhones.
IIRC its 12 months for the phone and 24 months for the battery. So if we go by what Louis Rossman has shown in his videos,Apple wants you to buy a new product when it fails.
Got to increase those margins!