Part No: 646801-001 - HP 4GB (1x4GB) 1333Mhz PC3-10600 Cl9 ECC Unbuffered DDR3 SDRAM SoDimm Memory

Capacity: 4GB (1 stick of 4GB)
Speed: 1333MHz
Memory Standard: PC3-10600
CAS Latency: CL9
ECC (Error-Correcting Code): ECC (provides error correction to improve data integrity, suitable for professional or mission-critical environments)
Buffering: Unbuffered (direct connection to the memory controller, ideal for laptops and other compact systems)
Form Factor: 204-Pin SoDIMM (Small Outline Dual Inline Memory Module)
Compatibility: Designed for laptops or systems supporting DDR3-1333 memory