The HP 399599-B21 is a dual‑core AMD Opteron 280 processor that runs at a base frequency of 2.40 GHz and incorporates a 2 MB L2 cache. Designed for enterprise server environments, this CPU delivers consistent performance for multi‑threaded workloads while maintaining a low power envelope typical of the Opteron 280 family. Its dual‑core architecture supports simultaneous execution of two independent instruction streams, and the 2 MB L2 cache provides a fast local memory pool for frequently accessed data. The processor is compatible with HP server platforms that support the Opteron 280 series, offering a reliable upgrade path for businesses seeking scalable compute power.