I guess it depends on how you define PC. But older consoles also used CPUs that were found in desktops (and laptops), although they weren't PCs in the strict sense.

• Sega Mega Drive (and other consoles) used the Motorola 68K that was also used on Macintosh and Amiga.
• Game Gear and Sega Master System used the Zilog Z80 which was also used in the ZX Spectrum and other computers.
• N64, PSOne, PS2 used MIPS CPUs which were often used in high-end computer systems (SGI).

Consoles did often have custom GPUs though.

That being said, these days both Playstation and Xbox are literally locked down, custom form factor, AMD Ryzen CPU + Radeon GPU PCs.