RDNA 3 and Zen 4 will be direct gpu connected. i believe zen4 and it's motherboard will be sufficent for that. that means people buying a new zen 4 processor, can use their old graphics card and will improved performance because of the direct gpu connection. i suppose AMD will profit more since infinity cache is unobstructed and you can showel alot of data in it in comparsion to the l1/l2/l3 cache system of nvidia.
https://youtu.be/fy-ZA9a5nJMand after that you have DDR5 in zen4 with 3D L3 Cache inside the cpu which is increasing it's performance. it will be glorious when zen 4 hits the market.
also see that chart. >50% performance/watt uplift. i hope they compare it on zen3 without direct gpu connect.