# Memory Module HPE DDR3 4GB 1333MHz ECC

**URL:** https://aio.lv/en/product--hp-enterprise-647893-b21-rfb--498203
**Data updated:** 2026-01-12 19:28 (EET)
**Category:** Memory (RAM)
**Manufacturer:** HP Enterprise
**Manufacturer code:** 647893-B21-RFB
**EAN:** 5712505242179
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The HPE 647893-B21 memory module offers 4 GB of DDR3 ECC memory with a clock speed of 1333 MHz. Designed for PC/Server use, it features a 240-pin DIMM form factor and CAS latency of 9. This reliable memory module enhances system performance and stability, making it ideal for demanding applications.

## Long description

The HPE 647893-B21 Memory Module HPE DDR3 4GB 1333MHz ECC is a 4 GB DDR3 ECC DIMM designed for PCs and servers. It operates at a clock speed of 1333 MHz with CAS latency 9 and uses the 240-pin DIMM form factor. With a voltage rating of 1.35 V, this HPE Enterprise module is intended to provide stable error-correcting memory for systems that support ECC DIMMs and require reliable performance for multitasking and data-integrity-sensitive workloads.
Advantages
ECC (Error-Correcting Code) memory helps detect and correct certain types of memory errors, increasing system reliability in server and workstation environments. The 1333 MHz DDR3 speed balances compatibility and performance for legacy platforms. The 240-pin DIMM design ensures compatibility with standard DDR3 memory sockets in supported motherboards. Low operating voltage of 1.35 V contributes to lower power consumption compared with higher-voltage modules while maintaining stable operation.
Suitable for
 Small and mid-range servers that accept DDR3 ECC 240-pin DIMMs
 Workstations and PCs requiring 4 GB ECC modules for system stability
 Replacement or upgrade of existing DDR3 1333 MHz ECC memory modules
 Environments where data integrity and continuous operation are priorities
Key specifications
 Brand: HP Enterprise
 Model / MPN: 647893-B21-RFB
 EAN: 5712505242179
 Capacity: 4 GB
 Memory type: DDR3 ECC
 Clock speed: 1333 MHz
 CAS latency: 9
 Form factor: 240-pin DIMM
 Voltage: 1.35 V
How to use
Power down the system and disconnect it from the mains before installing the DIMM. Open the case or server chassis according to the manufacturer's instructions. Locate the appropriate DDR3 240-pin ECC DIMM slot and release the retention clips. Align the notch on the module with the keyed slot and insert the module firmly until the clips latch. Reassemble the chassis, reconnect power, and power on the system. Confirm that the system BIOS/UEFI recognizes the new 4 GB ECC module and that ECC functionality is enabled if required by the platform.
Usage recommendations
Verify motherboard and server compatibility with DDR3 ECC 1333 MHz modules and check vendor support for mixed capacities or ranks before installing. For optimal reliability in multi-module configurations, install modules in matched pairs or following the server manufacturer's memory population guidelines. Use anti-static precautions during handling and consult system documentation for BIOS/UEFI settings related to ECC operation.

## Specifications

### Features

| Feature | Value |
|---|---|
| Internal memory | 4 GB |
| Internal memory type | DDR3 |
| Memory clock speed | 1333 MHz |
| Memory form factor | 240-pin DIMM |
| Memory voltage | 1.35 |
| ECC | Yes |
| CAS latency | 9 |
| Component for | PC/Server |
| Memory layout (modules x size) | 1 x 4 |

## FAQ

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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?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: internal memory, internal memory type, memory clock speed, memory form factor, memory voltage, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

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