HP 651898-001 - Heatsink - Includes heatsink, CPU thermal pad, processor alcohol pad, and processor installation information card - Greasenot inclu Retail
HP 441249-001 - System I/O board (motherboard) - Supports AMD Opteron and select AMD Athlon 64 processors - Includes base pan assembly, alcohol pad, and thermal grease syringe - Processors must be the same spare part number Retail