HP 518855-B21 is a complete processor kit featuring the AMD Opteron 6136, an 8‑core CPU engineered for enterprise workloads. The processor operates at a base frequency of 2.4 GHz and can boost to 3.2 GHz, delivering consistent performance across multi‑threaded tasks. It incorporates 12 MB of L3 cache to reduce latency and improve data throughput. The chip is designed for Socket G34, a common platform in HP server systems, and supports HyperTransport Link (HTL) for high‑speed inter‑processor communication. This kit provides a ready‑to‑install solution for upgrading HP server platforms that require robust, multi‑core processing power.