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HP AA656A 512MB DDR-266MHz RDIMM 1Rx4 CL2.5 Memory
- 512MB memory capacity
- DDR-266MHz (PC2100) speed
- Registered DIMM (RDIMM) for server environments
- 1Rx4 module configuration (single rank, 4 bits per chip)
- CL2.5 latency
- ECC (Error-Correcting Code) support for data integrity
- Designed for HP ProLiant servers and other compatible systems
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Product Overview
The HP AA656A is a 512MB RDIMM (Registered DIMM) memory module designed for enterprise servers and workstations. It operates at DDR-266MHz speed with CL2.5 latency, providing reliable performance for memory-intensive applications.
Technical Information
| Capacity | 512 MB |
| Memory Type | DDR SDRAM |
| Speed | 266 MHz (PC2100) |
| Form Factor | DIMM |
| Module Type | RDIMM (Registered DIMM) |
Additional Specifications
| Rank | 1Rx4 |
| CAS Latency | CL2.5 |
| ECC | Yes |
| Voltage | 2.5V |
Product Description
The HP AA656A is a 512MB Registered DIMM (RDIMM) memory module, specifically engineered for use in enterprise-level servers and high-performance workstations. RDIMMs are crucial in server environments as they include a register between the DRAM chips and the memory controller, which helps to reduce electrical load and improve signal integrity, allowing for higher memory capacities and speeds. This module operates at a DDR-266MHz frequency, also known as PC2100, providing a solid baseline for memory bandwidth in compatible systems. This memory module features a 1Rx4 configuration, indicating it is a single-rank module with four data bits accessed per memory chip. This configuration is common in server memory and contributes to efficient data transfer. The CAS Latency (CL) of 2.5 signifies the number of clock cycles required for the memory to respond to a column address command. Furthermore, the module supports ECC (Error-Correcting Code) functionality, which is vital for servers as it detects and corrects single-bit memory errors, preventing data corruption and system crashes, thereby enhancing overall system reliability and stability. Designed to meet the rigorous demands of enterprise computing, the HP AA656A memory module is suitable for a wide range of applications, including virtualization, database management, and complex scientific computations. Its compatibility with HP ProLiant servers and other systems that support DDR-266MHz RDIMMs makes it a reliable choice for memory upgrades or replacements, ensuring optimal performance and data integrity for critical business operations.



