The 633965-B21 is a genuine HP replacement processor designed for the ProLiant DL385 G7 server. It features an AMD Opteron 6180SE 12‑core CPU operating at 2.5 GHz, built on a Socket G34 interface. The chip includes a 12 MB L3 cache and a 6400 MHz front‑side bus, delivering balanced performance for virtualization, database, and high‑density workloads. As a direct upgrade component, it conforms to HP’s specifications and ensures compatibility with existing server firmware and cooling solutions, providing a straightforward path to increase core count without altering the overall system architecture.