Part No: 90Y4551 - IBM 4GB (1X4GB) 1333MHz PC3-10600 240-Pin Single Rank X4 CL9 ECC Registered DDR3 SDRAM RDIMM IBM Memory for SYSTE

Capacity: 4GB (1 x 4GB module)
Memory Type: DDR3 SDRAM
Speed: 1333 MHz (PC3-10600)
Form Factor: 240-pin RDIMM (Registered DIMM)
CAS Latency: CL9 (9 clock cycles for accessing data)
Voltage: 1.5V (standard operating voltage for DDR3 memory)
Rank: Single Rank X4 – This indicates that the memory module has a single set of chips, which can be beneficial for systems that do not need dual-rank configurations but still want reliable performance.
Error Correction: ECC (Error-Correcting Code) – Helps ensure data integrity by detecting and correcting errors, which is crucial in mission-critical applications.
Buffered/Registered: Registered (RDIMM) – Registered memory provides increased stability in large-memory systems, as it includes a buffer between the DRAM and the memory controller, improving performance and reliability.