[jandrese]

The Commodore 64's disk drive was more powerful than the CPU, containing the same 6502 as well as a pair of 6522s. Amusingly some programs would upload mathematical calculations to the disk drives to speed up processing.

https://www.lemon64.com/forum/viewtopic.php?t=27911

[ChickeNES]

Same thing with early laser printers. The original Apple Laserwriter had a faster clocked 68000 compared to the original 128k/512k Mac

[tonyedgecombe]

But then it did have to run PostScript which was very slow on those early devices.