Memory module IBM DDR3 4GB 1066MHz ECC 1x4GB

The IBM Memory module DDR3 4GB 1066MHz ECC 1x4GB is a single 4 GB registered DIMM designed for systems that require error-correcting memory. Built with DDR3 technology and a data rate corresponding to PC3-8500, this module operates at an effective clock speed of 1066 MHz and is configured as a 4GB single-rank x8 memory device. The 240-pin form factor fits standard DDR3 DIMM slots used in many servers and workstations, and ECC functionality helps detect and correct single-bit memory errors to improve data reliability.

Advantages

This memory module offers ECC support for enhanced data integrity and reduces the risk of crashes or corrupted data in critical applications. As a registered (RDIMM) module, it provides improved signal stability and scalability in multi-module server configurations. The 1066 MHz DDR3 speed and CAS latency characteristics provide a balance between performance and compatibility with a wide range of legacy systems. The single 4 GB capacity module makes it simple to add or replace memory without changing existing configurations.

Suitable for

• Server and workstation environments that require ECC memory for data integrity
• Systems with 240-pin DDR3 DIMM slots supporting registered modules
• Upgrading memory in legacy platforms that accept PC3-8500 (DDR3 1066 MHz)
• Configurations where incremental capacity additions (1x4GB) are preferred

When it may not be suitable

This module is not suitable for systems that only accept unbuffered (UDIMM) memory or non-ECC modules; it requires a motherboard and CPU that support registered ECC memory. It may also be incompatible with modern platforms that only support DDR4 or DDR5 memory standards, and its 1066 MHz speed may be lower than current consumer-grade memory frequencies used in newer desktop systems.

Key specifications

• Capacity: 4 GB (single module)
• Memory type: DDR3
• Data rate: PC3-8500
• Effective clock speed: 1066 MHz
• Form factor: 240-pin DIMM (registered)
• ECC support: Yes, error-correcting code
• Organization: 4Rx8, 1Gbit chips

How to use

Power down the system and disconnect all power sources before handling internal components. Open the chassis according to the system manufacturer's instructions, locate an available 240-pin DDR3 DIMM slot that supports registered ECC memory, and align the module with the slot notch. Press firmly and evenly until the module latches in place. After reassembling and reconnecting power, enter the system BIOS/UEFI to verify that the memory is recognized and operating in registered ECC mode. Refer to your server or motherboard documentation for any specific slot population rules or compatibility notes.

What to consider before purchase

• Confirm that your motherboard and CPU support DDR3 registered (RDIMM) ECC memory
• Verify available 240-pin DIMM slots and slot population rules for multi-module configurations
• Ensure system firmware supports the module's speed (1066 MHz) and organization (4Rx8)
• Check whether your environment requires ECC; non-ECC consumer systems will not accept this module

Usage recommendations

Install modules in matched pairs or according to the motherboard's recommended population scheme for optimal stability. Use this IBM DDR3 4GB 1066MHz ECC registered DIMM in server and workstation environments where error correction and signal reliability are prioritized over higher consumer memory speeds.