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Crucial

Crucial CT25672AA800 2GB DDR2 ECC Memory

★★★★★5.0 (3 reviews)

Affordable 2GB DDR2 ECC memory module for reliable, error-correcting server and workstation operation.

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Overview

The Crucial CT25672AA800 is a 2GB DDR2 ECC unbuffered DIMM rated at PC2-6400 speeds, designed for servers and workstations that require error-correcting memory in a 240-pin form factor. Manufactured by Crucial, a division of Micron Technology—one of the world's largest memory chip producers—this module carries the reliability pedigree expected in mission-critical environments. Its ECC capability automatically detects and corrects single-bit memory errors, a feature that matters most in systems running continuously or handling sensitive data where even a single flipped bit could cause corruption or downtime.

With a CAS latency of 6 and operating voltage of 1.8V, the module meets standard DDR2 specifications and should work in any compatible system without special configuration. However, prospective buyers should recognize that this is a legacy component. DDR2 has been superseded by three subsequent generations, and 2GB is a minimal capacity by today's standards. This module is best suited for replacing failed memory in existing DDR2 systems, expanding older machines to their supported limits, or maintaining spare inventory for legacy hardware that must remain operational.

Specifications

Brand
Crucial (Micron)
Model
CT25672AA800
Capacity
2GB
Type
DDR2 240-pin DIMM
Speed
PC2-6400 (800 MHz)
CAS Latency
CL6
ECC
Yes (Unbuffered)
Voltage
1.8V

Pros & Cons

👍 Pros

  • ECC error correction provides data integrity critical for server and workstation uptime
  • Crucial brand backed by Micron's manufacturing ensures consistent memory quality
  • Unbuffered design is compatible with a wide range of DDR2 ECC-capable motherboards
  • Low 1.8V operating voltage aligns with standard DDR2 power requirements

👎 Cons

  • 2GB capacity is very small by current standards, limiting usefulness to legacy system maintenance
  • DDR2 technology is multiple generations behind, offering lower bandwidth than DDR3, DDR4, or DDR5
  • PC2-6400 (800 MHz) speed is the ceiling for DDR2, with no room for faster operation
  • Only useful in systems that specifically require 240-pin DDR2 unbuffered ECC DIMMs

Frequently Asked Questions

It fits any system with 240-pin DIMM DDR2 slots that supports unbuffered ECC memory at PC2-6400 (800 MHz) speeds. Check your motherboard or server documentation before purchasing.
ECC (Error-Correcting Code) memory detects and corrects single-bit memory errors automatically, reducing the risk of data corruption and system crashes in servers and workstations.
No. Most motherboards require all installed memory to be either ECC or non-ECC. Mixing the two types typically prevents the system from booting.
It operates at 1.8V, which is the standard voltage for DDR2 memory modules.

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