The 686881-L21 is an HP‑specified AMD Opteron 6278 processor designed for integration into the ProLiant DL385p Gen8 server platform. Operating at a clock frequency of 2.40 GHz, this 16‑core CPU delivers high parallel processing capability while utilizing a 16 MB L3 cache to improve data access efficiency. The processor conforms to the Socket G34 form factor and supports a 6.4 GT/s interconnect, ensuring compatibility with the server’s memory and I/O architecture. As a genuine HP part, it is intended to provide reliable performance and seamless installation within the specified server generation.