---
product_id: 1200040
title: "Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 Unbuffered UDIMM 240-Pin Desktop Memory CT2KIT25664AA800 / CT2CP25664AA800"
brand: "micron"
price: "¥12167"
currency: JPY
in_stock: true
reviews_count: 8
category: "Micron"
url: https://www.desertcart.jp/products/1200040-crucial-4gb-kit-2gbx2-ddr2-800mhz-pc2-6400-cl6-unbuffered
store_origin: JP
region: Japan
---

# 800MHz blazing speed Easy plug & play install 240-pin UDIMM standard Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 Unbuffered UDIMM 240-Pin Desktop Memory CT2KIT25664AA800 / CT2CP25664AA800

**Brand:** micron
**Price:** ¥12167
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your desktop, upgrade your game!

## Quick Answers

- **What is this?** Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 Unbuffered UDIMM 240-Pin Desktop Memory CT2KIT25664AA800 / CT2CP25664AA800 by micron
- **How much does it cost?** ¥12167 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/1200040-crucial-4gb-kit-2gbx2-ddr2-800mhz-pc2-6400-cl6-unbuffered)

## Best For

- micron enthusiasts

## Why This Product

- Trusted micron brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Speed That Lasts:** 800MHz frequency with CL6 latency ensures smooth, responsive performance.
- • **Trusted Durability:** Backed by Crucial’s premium quality and a limited lifetime warranty.
- • **Boost Your Legacy Rig:** Transform aging desktops into multitasking powerhouses with 4GB DDR2 memory.
- • **Seamless Compatibility:** Fits perfectly in any DDR2 240-pin UDIMM slot for hassle-free upgrades.
- • **Effortless Installation:** No tech degree needed—upgrade your system in minutes and feel the difference.

## Overview

The Crucial 4GB Kit (2x2GB) DDR2 800MHz CL6 UDIMM is a high-quality, easy-to-install memory upgrade designed to boost older desktop systems. Featuring 240-pin unbuffered modules, it delivers reliable 800MHz speed and low latency for enhanced multitasking and system responsiveness. Trusted by thousands with a 4.7-star rating and backed by a limited lifetime warranty, this kit is the perfect cost-effective solution to breathe new life into legacy PCs.

## Description

CT2KIT25664AA800 is a 4GB kit consisting of (2) 2GB DDR2 Desktop modules that operates at speeds up to 800MHz and has a CL6 latency. It is Unbuffered and is non-ECC. It conforms to the industry standard UDIMM layout of 240 pins and is compatible with computers that take DDR2 UDIMM memory.

Review: Works Perfectly; No Hassle - I bought this product approximately a year and half ago. Once I received it, I popped it in the empty slots in my PC, fired it up, and waited to see what error would be displayed so I could start fixing it. Fortunately, I was very wrong! My computer is a Dell E510 that came with (a very under-powered) 512MB of RAM and Windows XP Media Center Edition (2005), making this computer somewhat aged. I slid these two sticks into the two empty slots and simply left the "stock" 256MB RAM sticks in there. My primary operating system at the time was Ubuntu 10.10, which showed a fair bit of enhancement when multiple windows were open, while Windows XP actually became *usable*. These sticks have worked perfectly fine with Windows XP, Ubuntu 10.10, 11.04, 11.10, and now 12.04, along with Fedora 14+, a few versions of OpenSUSE, and many other Linux distros. The only caveat is that my system is 32-bit, which means that I can only truly utilize approximately 3.5GB of the now-4.5GB present, although that's not by fault of this product, and is somewhat rectified by installing the PAE Linux kernel. In any event, this product has not only stood the test of time (I would say 1.5 years of use is plenty of time in computer years), but has also stood the test of diversity. Not only does this product meet my expectations, but it surpasses them, and at the cheapest price I could find at the time, too!
Review: Perfect, does what it says - Update 12/5/2016: It's 3.5 years later and this memory is still going strong. No issues whatsoever. I love Crucial/Micron RAM! ----------- [ORIGINAL REVIEW: 7/21/2013] It's perfect. It does what it's supposed to. Made my glacial 1gb system way faster, more responsive and multitasking is a breeze now. It's like a whole new machine. I inserted it, turned it on, and it just works. One week later, zero problems so far. A fantastic value, highly recommended for anyone who wants to resurrect an old computer before dropping several hundred on a new one. Incredibly easy, you could train a monkey to install it.

## Features

- Increases system performance
- Easy to install
- Premium quality memory from a trusted brand
- 100% Tested
- Identical To: CT2CP25664AA800

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0011A4UZE |
| Additional Features | Lightweight |
| Best Sellers Rank | #2,885 in Computer Memory |
| Brand | Micron |
| Column Address Strobe Latency | 6 |
| Compatible Devices | Desktop |
| Computer Memory Size | 4 GB |
| Customer Reviews | 4.7 out of 5 stars 1,033 Reviews |
| Data Transfer Rate | 800 MHz |
| Form Factor | DIMM 240-pin |
| Global Trade Identification Number | 00649528740076 |
| Item Height | 3.12 centimeters |
| Item Weight | 31.8 Grams |
| Manufacturer | CRUCIAL TECHNOLOGY |
| Memory Speed | 800 MHz |
| Model Name | Crucial |
| Number of Pins | 240 |
| RAM Memory Technology | DDR2 |
| RAM Size | 4 GB |
| Special Feature | Lightweight |
| UPC | 014445075745 803982741158 763615835169 012303270875 320127531967 012951722986 807030497851 809186273464 806293529958 809385668344 013040046884 012300514170 021112330663 172302905069 649528740076 |
| Voltage | 1.8 Volts |
| Warranty Description | Limited lifetime warranty |

## Product Details

- **Brand:** Micron
- **Computer Memory Size:** 4 GB
- **RAM Memory Technology:** DDR2
- **Memory Speed:** 800 MHz
- **Compatible Devices:** Desktop

## Images

![Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 Unbuffered UDIMM 240-Pin Desktop Memory CT2KIT25664AA800 / CT2CP25664AA800 - Image 1](https://m.media-amazon.com/images/I/61Rxw+oPzML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Perfectly; No Hassle
*by R***D on May 30, 2012*

I bought this product approximately a year and half ago. Once I received it, I popped it in the empty slots in my PC, fired it up, and waited to see what error would be displayed so I could start fixing it. Fortunately, I was very wrong! My computer is a Dell E510 that came with (a very under-powered) 512MB of RAM and Windows XP Media Center Edition (2005), making this computer somewhat aged. I slid these two sticks into the two empty slots and simply left the "stock" 256MB RAM sticks in there. My primary operating system at the time was Ubuntu 10.10, which showed a fair bit of enhancement when multiple windows were open, while Windows XP actually became *usable*. These sticks have worked perfectly fine with Windows XP, Ubuntu 10.10, 11.04, 11.10, and now 12.04, along with Fedora 14+, a few versions of OpenSUSE, and many other Linux distros. The only caveat is that my system is 32-bit, which means that I can only truly utilize approximately 3.5GB of the now-4.5GB present, although that's not by fault of this product, and is somewhat rectified by installing the PAE Linux kernel. In any event, this product has not only stood the test of time (I would say 1.5 years of use is plenty of time in computer years), but has also stood the test of diversity. Not only does this product meet my expectations, but it surpasses them, and at the cheapest price I could find at the time, too!

### ⭐⭐⭐⭐⭐ Perfect, does what it says
*by H***H on July 22, 2013*

Update 12/5/2016: It's 3.5 years later and this memory is still going strong. No issues whatsoever. I love Crucial/Micron RAM! ----------- [ORIGINAL REVIEW: 7/21/2013] It's perfect. It does what it's supposed to. Made my glacial 1gb system way faster, more responsive and multitasking is a breeze now. It's like a whole new machine. I inserted it, turned it on, and it just works. One week later, zero problems so far. A fantastic value, highly recommended for anyone who wants to resurrect an old computer before dropping several hundred on a new one. Incredibly easy, you could train a monkey to install it.

### ⭐⭐⭐⭐⭐ Great product and price!
*by N***1 on June 26, 2012*

Saved $30 versus the Crucial site and free shipping (did check their site for my specs and details on compatible replacements). I was upgrading my video card, so figured while I was messing around in the tower I could upgrade my 6 RAM to 8. It was very difficult due to the positioning in my tower, had to do a 90 degree bend to go around some permanent fixtures and access my motherboard. Look inside before you decide to do this if you are a novice like me. Also work in a very, very well lit room. Mine was not, I didn't have them fully installed as a result of not being able to see clearly, and so had some fun computer problems until I did install them correctly. I fixed the issue by being in a well lit, sunny room and now my computer works spectacularly, no halts or stops to boot or load. Now to fix my internet connection....

## Frequently Bought Together

- Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 Unbuffered UDIMM 240-Pin Desktop Memory CT2KIT25664AA800 / CT2CP25664AA800
- Crucial BX500 1TB 3D NAND SATA 2.5-Inch Internal SSD, up to 540MB/s - CT1000BX500SSD1, Solid State Drive
- Crucial Pro 32GB DDR4 RAM Kit (2x16GB), High-Performance 3200MHz (or 3000MHz or 2666MHz) Desktop Memory UDIMM 288-Pin, Compatible with Intel and AMD Ryzen - CP2K16G4DFRA32A

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/1200040-crucial-4gb-kit-2gbx2-ddr2-800mhz-pc2-6400-cl6-unbuffered](https://www.desertcart.jp/products/1200040-crucial-4gb-kit-2gbx2-ddr2-800mhz-pc2-6400-cl6-unbuffered)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-23*