Advanced Micro Devices (AMD) is one of the best-performing semiconductor stocks of 2019, beating 100% year-to-date growth. The high optimism for the company stems from its 7nm (nanometer) Zen 2 CPUs, which beat Intel’s (INTC) 14nm CPUs in price and performance.

One of the most impressive Zen 2 growth stories is that of AMD’s second-generation EPYC Rome CPU. AMD stock hit a new 13-year high on the launch of the EPYC Rome, and the CPU lived up to the hype. This is the first time since the Opteron (in 2006) that AMD is making its mark in the server CPU space versus Intel.

AMD records its sales from EPYC in the EESC (Enterprise, Embedded, and Semi-Custom) segment. Enterprise is the biggest contributor to EESC’s operating income because of EPYC’s high ASP (average selling price). Meanwhile, Semi-Custom is the biggest revenue contributor because of its volumes.