The CT12872AF667.9FG1D6 is a Crucial DDR2 SDRAM Memory Module commonly used in servers and workstations requiring ECC and Registered memory. Below is a detailed breakdown of the module based on Crucial's part number format: Specifications: Manufacturer: Crucial (a division of Micron Technology). Part Number: CT12872AF667.9FG1D6: CT: Crucial Technology. 12872: Identifies the module as a DDR2 Registered ECC DIMM. 667: Indicates the memory speed (DDR2-667, PC2-5300). Other parts represent internal manufacturing and configuration details. Capacity: 1GB per module. Memory Type: DDR2 SDRAM (Double Data Rate 2 Synchronous Dynamic Random-Access Memory). Speed: DDR2-667 MHz (PC2-5300). Bandwidth: 5.33 GB/s. Form Factor: 240-pin Registered DIMM (RDIMM). ECC: ECC (Error-Correcting Code): Corrects single-bit errors, ensuring data integrity in mission-critical applications. Buffered/Registered: Registered (Buffered): Improves signal integrity in systems with large memory configurations, typical for servers. Voltage: Operates at 1.8V, standard for DDR2 memory. CAS Latency: Likely CL5 or CL6, depending on system settings. Condition Refurbished Availability In Stock