# HP 512MB Flash Backed Cache Kit, 512MB, DDR2, 400MHz

**URL:** https://aio.lv/en/product--hp-enterprise-661069-b21-rfb--263469
**Data updated:** 2026-02-12 14:04 (EET)
**Category:** Server Parts & Components
**Manufacturer:** HP Enterprise
**Manufacturer code:** 661069-B21-RFB
**EAN:** 5711783399957
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The HP 512MB Flash Backed Cache Kit 661069-B21-RFB is a 512MB DDR2 memory module operating at a frequency of 400MHz. This memory enhances the performance of servers and storage devices. The kit is designed to ensure data security and reliability by preserving critical information during power outages. Its compact design and easy installation make it a great choice for data centers, compatible with various HP server series.

## Long description

The HP 512MB Flash Backed Cache Kit is a 512MB DDR2 memory module running at 400MHz designed to improve caching performance in compatible HP servers and storage controllers. The module combines volatile DRAM capacity with a flash-backed mechanism that preserves cached write data during power loss, helping maintain data integrity and reduce rebuild times. Its compact form factor and standard DDR2 400MHz timing allow straightforward installation into supported systems used in data center environments.
Advantages
This Flash Backed Cache Kit increases write caching efficiency by providing low-latency DDR2 memory paired with non-volatile protection. By preserving cached data during unexpected power interruptions, it reduces the risk of data loss and supports faster recovery. The module's 400MHz DDR2 performance balances throughput and latency for mixed I/O workloads, while its compatibility with HP server storage controllers simplifies integration and replacement.
Suitable for
Improving write cache performance in HP server RAID and storage controllers
Data centers requiring protected cache to reduce rebuild and recovery times
Systems running mixed transactional and sequential workloads
Environments where reliable short-term data persistence is needed during power loss
Key specifications
Memory capacity: 512MB
Memory type: DDR2
Operating frequency: 400MHz
Function: Flash-backed cache (volatile DRAM with non-volatile protection)
Form factor: module designed for server/cache controller installation
How to use
Install the module into the designated cache slot of a compatible HP server or storage controller following the server manufacturer's service manual. Ensure the system is powered down and appropriate electrostatic discharge precautions are taken before handling the module. After physical installation, verify that the server firmware and storage controller recognize the module and configure cache settings in the controller management interface according to workload requirements.
Usage recommendations
Use this kit in systems listed as supported by the server or storage controller documentation. Keep firmware and controller drivers up to date to ensure correct operation of flash-backed protection. Monitor cache health and capacity through management tools and replace the module with an equivalent specification if performance degradation or errors are reported.

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### What is the warranty period?

All HP Enterprise products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HP Enterprise service centers and through AiO.lv

### Can the product be returned after purchase?

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