But see this is the part that currently seems unreconcilable with 6800xt being navi21xt, 72cu part.
With TSMCs reported defect density in its 7nm process of 0.09, the ratio of good dies to defective dies is around 2:1.
https://www.anandtech.com/show/16028/better-yield-on-5nm-than-7nm-tsmc-update-on-defect-rates-for-n5
This report indicates and the graphs show that for 7+ nm defect density is at least as good as 7NP, if not better due to less stages in the lithography process.
So, for every 72cu die shipped to an AIB partner, amd are stock piling 2 full 80cu dies?
Below is a list of AMD gpu releases. For each segment, apart from the VII, the full die is always labeled as XT, with the cut XL or previously PRO. The XTX chip
if there has been one has remained in the same segment as the XT die.
View attachment 32278
Why is AMD seemingly changing this around this time, releasing a cut down 72cu die as an XT, keeping the full 80cu die as xtx, and shifting the XTX die to a new product segment, 6900xt
Then there is the report that the 6900xt will be limited in supply, but why would that be the case if it is the 80cu full die of the navi21 chip, when from TSMCs own reported defect density we can conclude that 2 full dies are created to 1 partial die. If the 80cu die is limited, then the 72cu is even more limited.
What does reconcile these differences is that the 6800xt is a different chip altogether, a 64cu ~400mm2 full die, while the 6900xt is the 80cu ~500mm2 full die. This way AMD can choose to produce less 80CU dies, and will be limited in supply as rumour suggests.
The leaked numbers though dont see to line up with a 64cu chip at 2.2 ghz however