The HP part number 653978‑B21 is a 16‑core AMD Opteron 6276 processor designed for servers that use the Socket G34 platform. Operating at a base frequency of 2.3 GHz, the chip delivers multi‑threaded performance across its sixteen cores, while a 16 MB L3 cache provides rapid data access for demanding workloads. The processor supports a 3200 MHz HyperTransport Link, facilitating high‑speed communication between the CPU and compatible system components. Engineered for enterprise environments, this Opteron model offers a balance of core density and cache capacity suitable for virtualization, database, and compute‑intensive applications.