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HP 495604-S21 64GB Kit (8x8GB) DDR2-667MHz FB-DIMM 2Rx4 CL5 Memory
- Kit Capacity: 64GB
- Module Capacity: 8GB each
- Total Modules: 8
- Type: DDR2
- Speed: 667MHz
- Form Factor: FB-DIMM (Fully Buffered DIMM)
- Rank: 2Rx4 (Dual Rank x4)
- Latency: CL5
- Designed for HP servers requiring FB-DIMM technology.
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Product Overview
The HP 495604-S21 is a 64GB Kit (8x8GB) of DDR2-667MHz FB-DIMM memory. It features a 2Rx4 configuration and CL5 latency, designed for high-density memory configurations in servers.
Technical Information
| Memory Type | DDR2 SDRAM |
| Form Factor | FB-DIMM |
| Kit Capacity | 64GB |
| Module Capacity | 8GB |
| Number of Modules | 8 |
| Speed | 667MHz |
Additional Specifications
| Rank | 2Rx4 |
| CAS Latency | CL5 |
| Voltage | 1.8V |
| Brand | HP |
| SKU | 495604-S21 |
Product Description
The HP 495604-S21 is a 64GB memory kit comprised of eight 8GB DDR2-667MHz Fully Buffered DIMM (FB-DIMM) modules. This configuration is designed for servers that require high memory capacities and utilize the FB-DIMM technology, which was prevalent in earlier generations of high-end servers for its ability to support greater memory density and bandwidth compared to standard RDIMMs of the era. Each 8GB module in this kit is a 2Rx4 configuration, meaning it is dual-rank with each rank using x4 DRAM chips. The FB-DIMM design incorporates an Advanced Memory Buffer (AMB) chip on each module, which serializes and de-serializes data, effectively decoupling the memory from the memory controller and allowing for higher clock speeds and more modules per channel. The CAS Latency (CL) is CL5, indicating the timing characteristic for accessing data. This 64GB kit is intended for HP servers that specifically support DDR2 FB-DIMMs and require substantial memory resources for demanding enterprise workloads such as large-scale virtualization, complex database operations, and high-performance computing. The 495604-S21 SKU represents a complete package designed to provide a significant memory upgrade or initial configuration for compatible HP server platforms.
