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By largely carrying over RDNA 2 technology for the shaders in the PS5 Pro's GPU, game developers can compile a single code path and have it run on both the PS5 and the PS5 Pro.

More specifically, it was an RDNA 2 GPU, meaning it used the second generation of RDNA 2 technology. The GPU has sub-units called Work Group Processors (WGP). PlayStation 5 has 18 of them.