Part No: 89Y9225 - IBM Lenovo 4GB PC3-10600 DDR3-1333MHz non-ECC Unbuffered CL9 204-Pin SoDimm Memory Module

Capacity: 4GB
Memory Type: DDR3 SDRAM
Speed: 1333 MHz (PC3-10600)
Form Factor: 204-pin SoDIMM (Small Outline Dual Inline Memory Module) – Commonly used in laptops, ultrabooks, and small form-factor desktops.
CAS Latency: CL9 (9 clock cycles for accessing data)
Error Correction: Non-ECC (does not include error correction)
Buffered/Unbuffered: Unbuffered – This means the memory operates faster but does not have the additional stability provided by buffered (or registered) memory modules.