Epyc is a brand of multi-core x86-64 microprocessors designed and sold by AMD, based on the company's Zen microarchitecture. Introduced in June 2017, they are specifically targeted for the server and embedded system markets.
A delidded second gen Epyc 7702, showing the die configuration
A near-infrared photograph of a delidded second gen Epyc 7702. Each CCD has two CCXs
A Epyc 7001 die configuration
A second generation Epyc CPU in an SP3 socket
A multi-core processor is a microprocessor on a single integrated circuit with two or more separate processing units, called cores, each of which reads and executes program instructions. The instructions are ordinary CPU instructions but the single processor can run instructions on separate cores at the same time, increasing overall speed for programs that support multithreading or other parallel computing techniques. Manufacturers typically integrate the cores onto a single integrated circuit die or onto multiple dies in a single chip package. The microprocessors currently used in almost all personal computers are multi-core.
An Intel Core 2 Duo E6750 dual-core processor
An AMD Athlon X2 6400+ dual-core processor
An embedded system on a plug-in card with processor, memory, power supply, and external interfaces