User Guide

 [AMD Public Use]
DISABLING CORES AND CCXS
(1)
AMD Ryzen Master 2.6 Reference Guide | November 2020 38
• Cores must be disabled with symmetry across active CCXs
• A disabled CCX or CCD is not considered in the symmetry requirement.
• An entire CCX can be disabled, requiring disabled core
symmetry only across the remaining active CCXs
• For AMD 3000-Series processors with more than on CCD
(more than 8 cores), such as the Ryzen 9 3900X, the Active
CCD Mode can be used to disable entire CCDs to focus
power and cooling on specific cores of interest.
• Cores can be disabled under any Control Mode
1) Only supported on Ryzen and Ryzen
Threadripper 2000 Series CPU products.