Part No: 46W0771 - IBM 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module

Capacity: 8GB
Type: DDR3 (Double Data Rate 3)
Speed: 1600MHz (PC3-12800)
Error Correction: ECC (Error-Correcting Code) – helps detect and correct memory errors to ensure data integrity.
Form Factor: 240-Pin DIMM (Dual In-line Memory Module)
Rank: Single Rank – refers to the memory module having one set of memory chips, which may result in slightly lower performance than dual-rank modules but is still reliable.