https://www.overclock3d.net/news/cpu_mainboard/amd_is_reportedly_achieving_great_yields_on_their_zen_2_cpu_dies_but_not_as_good_as_last-gen/1
 
A report from Bits and Chips has claimed that AMD's 7nm Zen 2 dies are being manufactured with a yield rate of around 70%, which isn't bad for a new processor on a leading-edge process node. While AMD's 14nm Zen dies had higher yields than this, it must be remembered that we are much earlier in 7nm's life cycle than AMD's Zen products were for 14nm. Yield rates will improve as TSMC's 7nm process matures. 
 
For context, it is also claimed that the yield rate for Intel's 28-core CPU dies have a yield rate of 35%, a data point which partially explains why Intel's high core count processors cost so much. This positions AMD to make some serious profit from their high core count Zen 2 EPYC offerings, as their higher yield rate lowers the cost/chip of their CPU manufacturing, significantly increasing their profit margins.  Regardless of what way you look at it, high yield rates for AMD's Zen 2 processors are a good sign for the company, as lower chip costs will enable the company to generate more profit per sale and offers the company more room for price reductions later down the line. 

Lmao, well yeah, it's a tiny chiplet more square than the wide rectangle that Summit Ridge was. One doesn't need proof for it to be the case, it's just math.