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IBM FC4447 512MB DDR-266MHz RDIMM 1Rx4 CL2.5 Memory
- Capacity: 512MB
- Type: DDR SDRAM
- Speed: 266MHz (PC2100R)
- Form Factor: RDIMM (Registered DIMM)
- Rank: 1Rx4 (1 Rank, 4 bits per rank)
- CAS Latency: CL2.5
- Voltage: 2.5V
- ECC: Yes (Error-Correcting Code)
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Product Overview
This IBM 512MB RDIMM memory module operates at DDR-266MHz with a CAS Latency of 2.5. It features a 1-rank x 4-bit organization, designed for older server systems requiring ECC support and lower density.
Technical Information
| Brand | IBM |
| Part Number | FC4447 |
| Capacity | 512MB |
| Memory Type | DDR SDRAM |
| Speed | 266MHz |
Additional Specifications
| Form Factor | RDIMM |
| Rank | 1Rx4 |
| CAS Latency | CL2.5 |
| ECC | Registered ECC |
Product Description
The IBM FC4447 is a 512MB Registered DIMM (RDIMM) module designed for legacy server and workstation systems that utilize DDR SDRAM technology. It operates at a clock speed of 266MHz, corresponding to the PC2100R specification. RDIMMs include an onboard register chip that buffers the command and address signals, which helps to reduce the electrical load on the memory controller. This design characteristic was essential for enabling higher memory capacities and ensuring system stability in the server architectures of the DDR era. This module is configured as 1-rank x 4-bit (1Rx4). A single rank indicates that there is one set of memory chips on the module, and each chip is organized with 4 bits of data per bank. This configuration is typical for lower-density memory modules. The CAS Latency (CL) is rated at 2.5, signifying a very low number of clock cycles required for the memory to respond to a data request after the column address is received. This low latency, coupled with the 266MHz operating frequency, provided adequate performance for the computing demands of its time. As an ECC (Error-Correcting Code) module, the FC4447 is capable of detecting and correcting single-bit errors, a critical feature for maintaining data integrity and system reliability in server environments. It operates at a standard voltage of 2.5V. This IBM RDIMM is suitable for maintaining or upgrading older IBM servers and other systems that specifically require DDR-266MHz RDIMMs with ECC support and lower memory capacities.
