Because I was talking about CPU and GPU that are doing the most important calculations. You added chips that help with certain things.
PC motherboard has shit ton of tiny chips on it as well, while stuff that is inside CPU and GPU is the most important thing for games performance.
Cache scrubbers are the only truly custom thing about base PS5 GPU, but how they compare to desktop RDNA2 systems or what is inside XSX GPU? PS4 had ACE modification and PS4 Pro supported 2x FP16 calculations. Those are the differences between them and Pitcairn, Polaris and RDNA1/2. Small differences...