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Most do not, but some do. For example a Northbridge has processor functions but is not a CPU, whereas a video card's GPU is a CPU- for the video card. Hence the name GPU: Graphical processing Unit

Typically only the CPU itself, videocards, and in some cases Storage Controllers, network cards, and some soundcards have a CPU. This is not always the case.

Videocards almost always have their own GPU

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Q: Do micro controllers have central processing units?
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Micro-operations are detailed low-level instructions used in some designs of computer central processing units. They mainly implement complex machine instructions.


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