I was under the impression all the big modern consoles were using customized AMD GPUs. For example, according to the PS4's Wikipedia entry [0], its GPU is a "Semi-custom AMD GCN Radeon (integrated into APU)". Are those customizations made by AMD for Sony, instead of licensing the technology?

I found an article claiming Intel is licensing AMD GPU technology [1]. If that's the case, would it be surprising to see Apple do the same?

[0] https://en.wikipedia.org/wiki/PlayStation_4

[1] https://seekingalpha.com/article/4042977-new-details-intels-...