What Does Boxed Processor Mean?

A boxed processor is a CPU that is sold by a manufacturer to be installed by a consumer, usually as part of a self-assembled computer system. The term comes from the fact that these CPUs are sold in boxes that include the CPU along with a heat sink, fan and a set of installation instructions.

Techopedia Explains Boxed Processor

A boxed processor is a CPU that, as the name suggests, is sold in a box. These CPUs are marketed to system builders that install the CPUs into their own machines themselves. The box typically includes the CPU as well as the fan/heat sink assembly. The heat sink and fan may already be attached to the CPU or the customer might have to attach it manually. The CPU/heat sink combination also typically comes with installation instructions.