Comment by soganess
Asking this as an open ended (if leading) question: I assume enough people are doing it otherwise PS5 Pro makes no sense... Right?
They (AMD/Sony) shoehorned the RDNA 3/3.5 GPU architecture onto an older Zen 2 core, with a different process node, because... they felt like making a frankenAPU? Especially since the APUs are usually monolithic (vs chiplet) in design and share a memory controller. Surely it would have been easier/cheaper to put in 8 zen 4c/5c cores and call it a day.
I'm pretty sure I'm just missing something obvious...
For PlayStation APUs, it's likely that AMD presents a menu of options and Sony chooses which components they want. For PS5 Pro, the CPU is unchanged from PS5 because Sony doesn't feel the need for anything faster. A newer CPU would take more area. But Sony really wanted better raytracing and AI so they chose RDNA 3.9 or whatever for the GPU. I suspect the cores are all mostly synthesized so they can support any process and Infinity Fabric is compatible enough that you can mix and match new and old cores.