> CCD

Core Complex Die - an AMD term for a chiplet that contains the CPU cores and cache. It connects to an IOD (I/O die) that does memory, PCIe etc (≈southbridge?).

Aside: CCX is Core Complex - see Figure 1 of https://www.amd.com/content/dam/amd/en/documents/products/ep...

For any other older fogeys that CCD means something different.