The part number 518860‑B21 is an HP‑branded AMD Opteron 6174 processor designed for integration into HP Proliant server platforms. It features twelve physical cores operating at a base clock of 2.2 GHz and incorporates a 12 MB shared L3 cache to support multi‑threaded workloads. The processor utilizes a 6400 MHz front‑side bus and is built for the Socket‑G34 interface, ensuring compatibility with server motherboards that support this socket type. This configuration provides a balance of core density and clock speed suitable for enterprise applications that require reliable performance within the Proliant ecosystem.