Introduction After labouring with practically no presence in the x86 server market for a long time, AMD has built momentum through the release of Zen-based Epyc processors starting with first-generation 'Naples' in 2017. AMD took advantage of Intel roadmap slips by releasing second-generation 'Rome' in 2019, which is particularly notable for doubling the core-and-thread count and quadrupling the L3 cache in one generation and on the same underlying platform. The capability of AMD's server hardware has since convinced the leading server vendors - Dell, HPE, Lenovo, et al - to take Epyc seriously, and each has product lines for a broad range of use-cases.