Crucial

Crucial CT25664AA800 2GB DDR2 PC2-6400 DIMM Memory

Name: Crucial CT25664AA800 2GB DDR2 PC2-6400 DIMM Memory
Brand: Crucial
SKU: CT25664AA800-A1

★★★★★4.0 (1 reviews)

Affordable 2GB DDR2 memory module from Crucial provides a simple upgrade path for aging desktop systems.

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Overview

The Crucial CT25664AA800 is a 2GB DDR2 desktop memory module operating at PC2-6400 speeds, which translates to an 800MHz effective clock rate. As a 240-pin unbuffered DIMM, it is designed for standard desktop motherboards from the DDR2 era, roughly spanning systems built between 2004 and 2010. Crucial, as the retail brand of Micron Technology — one of the world's largest DRAM manufacturers — offers a level of quality assurance that generic memory modules often lack.

This module is a practical choice for users looking to add memory to or replace a failed stick in an older desktop that still serves a purpose, whether as a basic office machine, a network terminal, or a dedicated appliance. At 2GB, it will not enable modern multitasking or heavy workloads, but it can help an older system run a lightweight Linux distribution or Windows XP/7 more comfortably. The DDR2 standard draws more power and delivers less bandwidth than its successors, so this is strictly a maintenance or life-extension upgrade rather than a performance investment.

Key Features

More for the money with this high quality Product

Offers premium quality at outstanding saving

Excellent product

100% satisfaction

Specifications

Brand

Crucial (Micron)

Model

CT25664AA800

Capacity

2GB

Memory Type

DDR2

Form Factor

240-pin DIMM

Speed

PC2-6400 (800MHz)

ECC

Non-ECC Unbuffered

Pros & Cons

👍 Pros

Crucial is a trusted memory brand backed by Micron's own DRAM manufacturing
Straightforward drop-in upgrade that requires no tools beyond opening the PC case
PC2-6400 speed rating runs at 800MHz, the fastest standard DDR2 specification
Low cost makes it an economical way to extend the usable life of an older desktop

👎 Cons

2GB capacity is very limited by modern standards and insufficient for current operating systems
DDR2 technology is two generations behind current DDR5, offering lower bandwidth and higher power consumption
Only useful for legacy systems that cannot accept DDR3 or DDR4 memory
Single 2GB module means you cannot run in dual-channel mode without purchasing a second identical stick

Frequently Asked Questions

What systems is this memory module compatible with?

This is a 240-pin DDR2 DIMM running at PC2-6400 (800MHz) speeds, compatible with desktop motherboards that support DDR2 memory. Check your motherboard specifications before purchasing.

Can I mix this module with other DDR2 RAM already in my system?

Generally yes, as long as the existing RAM is also DDR2 and your motherboard supports the combined capacity. The system will typically run all modules at the speed of the slowest installed module.

Is this module ECC or non-ECC?

This is a standard non-ECC unbuffered DIMM designed for consumer desktop systems, not servers or workstations requiring ECC memory.

Will this work in a laptop?

No, this is a 240-pin DIMM designed for desktop computers. Laptops require the smaller SO-DIMM form factor.