---
product_id: 9258521
title: "4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules"
brand: "a-tech"
price: "€ 73.75"
currency: EUR
in_stock: true
reviews_count: 9
category: "A Tech"
url: https://www.desertcart.ie/products/9258521-4gb-2x2gb-ddr2-800mhz-udimm-pc2-6400-cl6-1-8v
store_origin: IE
region: Ireland
---

# 800MHz blazing speed 4GB dual-channel kit 1.8V low power efficiency 4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules

**Brand:** a-tech
**Price:** € 73.75
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your legacy rig with lightning-fast DDR2 power!

## Quick Answers

- **What is this?** 4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules by a-tech
- **How much does it cost?** € 73.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/9258521-4gb-2x2gb-ddr2-800mhz-udimm-pc2-6400-cl6-1-8v)

## Best For

- a-tech enthusiasts

## Why This Product

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

## Key Features

- • **Broad Compatibility:** Works flawlessly with most DDR2 240-pin motherboards supporting PC2-6400 & PC2-5300.
- • **Plug & Play Upgrade:** Easy installation with no tech expertise needed—revive your desktop instantly.
- • **Blazing 800MHz Speed:** Maximize multitasking and loading times with DDR2 PC2-6400 performance.
- • **Dual-Channel 4GB Kit:** Two 2GB modules unlock full bandwidth for seamless productivity.
- • **Lifetime Warranty & Support:** Confidence backed by A-Tech’s lifetime warranty and expert customer care.

## Overview

The A-Tech 4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 RAM kit delivers reliable, high-speed memory upgrade for DDR2-compatible desktops. Featuring dual 2GB modules for optimal dual-channel performance, it operates at a power-efficient 1.8V and supports JEDEC DDR2 standards. Easy to install and backed by a lifetime warranty, this RAM kit breathes new life into older systems, boosting multitasking and load speeds with broad motherboard compatibility.

## Description

Buy A-Tech 4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules: Memory - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Highly compatible DDR2 RAM Modules, can handle both 800 MHz PC-6400 and 667 MHz PC-5300 excellent value! - This is an excellent product, I got two 4GB kits (4 modules), and all four worked just great, fully compatible with both Intel based computers where they were installed, I feel these memory modules are an excellent value, and revived a pair of 8+ year old computers, one of the computers is an Asrock G31M-GS based system, the other an Elitegroup 945GCT-M/1333 v3.0 with max RAM specs of 4GB (2 GB per slot) DDR2 667 MHz PC-5300, but I took a chance with these RAMs and they adjusted perfectly from 800 MHz down to 667 MHz (not all RAM modules can do this), in other words these modules can handle both 800 MHz PC-6400 and 667 MHz PC-5300. I would definitely like to try A-Tech's other RAM modules like DDR3 in the near future. It must be noted that (at least the ones I got), these RAMs can not handle the 533 MHz PC-4200 standard, this was not a problem for me, but if your motherboard/system is of an older type that can only accept this standard, then these modules won't work for you. Bottom line is that if your system/motherboard can handle 240-pin DIMM (Desktop PC), non ECC, DDR2, PC-6400 (800 MHz) or PC-5300 (667 MHz) RAM, then I would say there is a 99% chance these modules will be compatible with it. Tip, if for example you plan to get 4 GB of RAM,, get a kit (2 modules of 2 GB each), vs getting a single 4 GB stick, when you get a kit (two identical modules) you can benefit from dual channel, that way you can get a full 800 MHz speed vs just 400 MHz from a PC-6400 DDR2 when you use a single or an odd number of RAM sticks.
Review: No problems! Great replacement for faulty memory. - Worked fine. Have been running for several months with no issues.

## Features

- Memory RAM Compatible for select DDR2 capable Desktop, PC Computers + Easy to install at home, no expertise required
- Maximize your system's performance, boost loading speeds, and multitask with ease
- Backed by A-Tech's Lifetime Warranty + Friendly tech support team available to help before and after your purchase
- 4GB RAM Kit ( 2 x 2GB Modules ) | DDR2 DIMM 240-Pin
- Speeds up to 800MHz, PC2-6400
- NON-ECC Unbuffered ( UDIMM ) | 1Rx8 or 2Rx8 - Single or Dual Rank | JEDEC DDR2 standard 1.8V

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C5378J6 |
| Best Sellers Rank | #424 in Computer Memory |
| Brand | A-Tech |
| Color | DDR2 800MHz (PC2-6400) |
| Computer Memory Type | DDR2 SDRAM |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,630) |
| Date First Available | May 22, 2013 |
| Hardware Platform | PC |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 6.5 x 3.45 x 0.3 inches |
| Item Weight | 0.81 ounces |
| Item model number | FBA_CT2KIT25664AA800 |
| Manufacturer | A-Tech Components |
| Memory Speed | 800 MHz |
| Product Dimensions | 6.5 x 3.45 x 0.3 inches |
| RAM | 4 GB DDR2 |
| Series | FBA_CT2KIT25664AA800 |
| Voltage | 1.8 Volts |

## Product Details

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

## Images

![4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules - Image 1](https://m.media-amazon.com/images/I/81Ue8HGEmxL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: what is the cl?**
A: There is no cl in the description of this product.

**Q: Hello will this work on my dell xps 630 motherboard with 4 slots? (it currrently has 4 1gb sticks of pc2-6400u non eec dim 240pin memory in it)**
A: Hi, yes it will work on your Dell but if you're planning to put 2 gigs on each slot it will be a good idea to check out what is the maximum acceptable memory of your pc before you purchase the sticks

**Q: would this work on my eMachines ET1331G-05w?**
A: DDR2 PC2-6400 Unbuffered NON-ECC 1.8V 128Meg x 64, according to e-machines web site I would say they should, the following was taken from their website

**Q: Is your RAM compatible with my existing RAM which is the Corsair XMS2 DDR2 CM2X2048 6400C5C 800MHZ?**
A: The simple answer is , Yes. A-Tech Brand 4GB kit (2GBx2) DDR2 PC2-6400 DESKTOP Memory Modules (240-pin DIMM, 800MHz) is compatibile with your current Corsair XMS2 memory. This A-Tech Brand memory kit is "structurally identitical" with your Corsair memory kit. Meaning both run at 800MHz, are PC2-6400 DDR2 memory for desktops, and are 2-DIMMs each with a capacity of 2GBs, while collectively contain a capacity of 4GBs. So, you can use the A-Tech Brand memory as a replacement or supplement to your current Cosair XMS2 memory. Thanks for asking.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Highly compatible DDR2 RAM Modules, can handle both 800 MHz PC-6400 and 667 MHz PC-5300 excellent value!
*by J***D on January 31, 2016*

This is an excellent product, I got two 4GB kits (4 modules), and all four worked just great, fully compatible with both Intel based computers where they were installed, I feel these memory modules are an excellent value, and revived a pair of 8+ year old computers, one of the computers is an Asrock G31M-GS based system, the other an Elitegroup 945GCT-M/1333 v3.0 with max RAM specs of 4GB (2 GB per slot) DDR2 667 MHz PC-5300, but I took a chance with these RAMs and they adjusted perfectly from 800 MHz down to 667 MHz (not all RAM modules can do this), in other words these modules can handle both 800 MHz PC-6400 and 667 MHz PC-5300. I would definitely like to try A-Tech's other RAM modules like DDR3 in the near future. It must be noted that (at least the ones I got), these RAMs can not handle the 533 MHz PC-4200 standard, this was not a problem for me, but if your motherboard/system is of an older type that can only accept this standard, then these modules won't work for you. Bottom line is that if your system/motherboard can handle 240-pin DIMM (Desktop PC), non ECC, DDR2, PC-6400 (800 MHz) or PC-5300 (667 MHz) RAM, then I would say there is a 99% chance these modules will be compatible with it. Tip, if for example you plan to get 4 GB of RAM,, get a kit (2 modules of 2 GB each), vs getting a single 4 GB stick, when you get a kit (two identical modules) you can benefit from dual channel, that way you can get a full 800 MHz speed vs just 400 MHz from a PC-6400 DDR2 when you use a single or an odd number of RAM sticks.

### ⭐⭐⭐⭐⭐ No problems! Great replacement for faulty memory.
*by C***Y on October 20, 2025*

Worked fine. Have been running for several months with no issues.

### ⭐⭐⭐⭐⭐ Installed and Up and Running in Minutes - Worked Flawlessly
*by T***M on July 22, 2023*

When I began to randomly get the dreaded "blue screen" I tested my old Optiplex 760's memory at startup by pressing the F12 key and, sure enough, there was a memory problem. Rummaging around on the web I found a description of the memory in this machine and did a search on Amazon. A huge number of choices came up but I picked this one based on the reviews about the reliability of the company and the support. It came a day early, was packaged professionally and the information on the package and the leaflet was obviously written by someone who was both knowledgable and proficient in English -- something that is becoming increasingly rare these days when instructions are often incomprehensibly written by a person struggling with a second language. There was a little card enclosed with installation hints, troubleshooting tips, a support number, and a believable promise of satisfaction. The memory installed without a hitch, fit perfectly in the slots in the computer, and worked flawlessly as well as passing the startup diagnostic tests when I ran them. I'll use A-Tech again!

## Frequently Bought Together

- A-Tech 4GB (2x2GB) DDR2 800MHz UDIMM PC2-6400 CL6 1.8V DIMM Non-ECC Unbuffered Desktop RAM Memory Modules
- Kingston 240GB A400 SATA 3 2.5" Internal SSD SA400S37/240G - HDD Replacement for Increase Performance

---

## 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.ie/products/9258521-4gb-2x2gb-ddr2-800mhz-udimm-pc2-6400-cl6-1-8v](https://www.desertcart.ie/products/9258521-4gb-2x2gb-ddr2-800mhz-udimm-pc2-6400-cl6-1-8v)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-14*