Part No: 73P2683 - IBM 256MB PC3200 DDR-400MHz non-ECC Unbuffered CL3 184-Pin DIMM Memory Module for ThinkCentre A51 S50

Capacity: 256MB
Memory Type: DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory)
Speed: 400 MHz (PC3200 standard) – This indicates the memory operates at a frequency of 400 MHz, providing higher bandwidth compared to slower DDR variants.
Form Factor: 184-pin DIMM (Dual Inline Memory Module) – Standard for desktops and compatible systems.
CAS Latency: CL3 – This refers to the number of clock cycles it takes for the memory to access data. CL3 is a moderate latency compared to CL2.5 or CL2 modules.
Error Correction: Non-ECC – Unlike ECC memory, this module does not have error-correcting features, which is generally fine for consumer-grade applications where data integrity is less critical.
Buffered/Unbuffered: Unbuffered – Unlike registered memory, unbuffered modules are typically used in consumer systems and may have faster access times but less stability when using large amounts of memory.