Tend to agree with others, AMD has limited wafer allocation, with that:
1) they have to make lots of console chips, this must be in the contract.
for the rest do you:
a) make lots of cpus which are already ahead of their competitor performance wise, and their competitor is still busy shooting itself in the foot.
b) make gpu's which you are currently behind your competitor in performance and features and your competitor just released a new range with one of the biggest performance uplifts ever.
It's not rocket science, they will make cpu's. They'll do just enough gpu's to stay in the market.
AMD needs approximately 5k wafers for 1 Million XBOX SX Console Chips (360mm2) (~200 good dies per wafer) per month.
H2 2020 AMD has 30K 7nm wafers in TSMC, being the number one 7nm customer.
Also to note that not many have realized, AMD increased its inventory by ~30% the last quarter (Q2 2020) to 1.3B and they had 6 months lead until the new Console launch in December 2020.
So, they have enough wafer capacity for their CPUs, GPUs and new Console chips.
On the other hand, NVIDIA with a 627mm2 Ampere GA102 chip found in RTX3080 and RTX3090 can have less than 50 good dies per wafer.
That means they need 4x times the wafer volume for the same amount of chips. For this I dont see a lot of RTX3080/3090 cards at retail stock in the first 2-3 months after Ampere launch.