---
product_id: 340397392
title: "Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM"
brand: "crucial"
price: "A$0"
currency: AUD
in_stock: false
url: https://www.desertcart.com.au/products/340397392-crucial-4gb-ddr4-sdram-memory-module-4-gb-ddr4-2666
store_origin: AU
region: Australia
---

# 2666 MHz Speed 1.20 V Voltage 4 GB Capacity Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM

**Brand:** crucial
**Price:** A$0
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate Your Tech Game with Crucial Memory!

## Quick Answers

- **What is this?** Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM by crucial
- **How much does it cost?** A$0 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/340397392-crucial-4gb-ddr4-sdram-memory-module-4-gb-ddr4-2666)

## Best For

- crucial enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Weighing only 16g, this memory module is perfect for sleek builds.
- • **Seamless Compatibility:** Engineered for a wide range of systems, ensuring hassle-free upgrades.
- • **Unleash Your Potential:** Experience lightning-fast performance with DDR4-2666 speed.
- • **Future-Proof Your Setup:** Stay ahead with DDR4 technology, ready for the demands of tomorrow.
- • **Power-Efficient Performance:** Designed to operate at just 1.20 V for optimal energy savings.

## Overview

The Crucial 4GB DDR4 SDRAM Memory Module offers a robust 4 GB capacity with a speedy 2666 MHz clock rate, designed for modern computing needs. Operating at a low voltage of 1.20 V, this unbuffered DIMM module ensures efficient performance while maintaining compatibility across various systems. Ideal for gamers and professionals alike, it’s the perfect upgrade for anyone looking to enhance their device's capabilities.

## Description

Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM,Memory Size: 4 GB,Memory Technology: DDR4 SDRAM,Memory Voltage: 1.20 V,Memory Speed: 2666 MHz,Memory Standard: DDR4-2666/PC4-21300

## Features

- Memory Size: 4 GB
- Memory Technology: DDR4 SDRAM
- Memory Voltage: 1.20 V
- Memory Speed: 2666 MHz
- Memory Standard: DDR4-2666/PC4-21300
- For performance or compatibility related issues customers will have to reach out to Crucial's technical support. For more details, kindly refer to our Refund Policy page.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Crucial |
| Manufacturer | MIcron Technology |
| Series | SDRAM-Unbuffered |
| Colour | Green |
| Form Factor | DIMM |
| Item Height | 1.23 Inches |
| Item Width | 0.03 Inches |
| Product Dimensions | 13.34 x 0.08 x 3.12 cm; 16 g |
| Batteries | 1 Lithium Ion batteries required. |
| Item model number | CT4G4DFS6266 |
| Processor Count | 1 |
| RAM Size | 4 GB |
| Memory Technology | DDR4 |
| Computer Memory Type | DDR4 SDRAM |
| Memory Clock Speed | 2666 MHz |
| Voltage | 1.2 Volts |
| Wattage | 3600 |
| Are Batteries Included | No |
| Lithium Battery Energy Content | 2 Kilowatt Hours |
| Lithium Battery Weight | 2 Grams |
| Number of Lithium Ion Cells | 5 |
| Number of Lithium Metal Cells | 5 |
| Included Components | DRAM |
| Manufacturer | MIcron Technology |
| Item Weight | 16 g |

## Product Details

- **Brand:** Crucial
- **Computer Memory Size:** 4 GB
- **RAM Memory Technology:** DDR4
- **Memory Speed:** 2666 MHz
- **Special Feature:** Memory Standard: DDR4-2666/PC4-21300

## Images

![Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM - Image 1](https://m.media-amazon.com/images/I/61j3CTxnXVL.jpg)
![Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM - Image 2](https://m.media-amazon.com/images/I/51o+mxsOM+L.jpg)
![Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM - Image 3](https://m.media-amazon.com/images/I/61WrSm1ISgL.jpg)
![Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 288-pin - DIMM - Image 4](https://m.media-amazon.com/images/I/71-M8FYU++L.jpg)

## Questions & Answers

**Q: I bought a single 8Gb stick of this for my build - it says 2400 but is running at 1200. Why? Is it only 2400 if I run 2 sticks?**
A: Modern DRAM modules support double data rate (DDR) transfers, meaning that although they function at a given clock speed, they transfer data during both the rise and fall of a CPU clock cycle, allowing for double the data transfers their native speed, or frequency, would suggest. Some diagnostic or system information software does not express this clearly, only reflecting the modules' frequency in megahertz (MHz), making such feedback suggest that your parts are only running at half their possible speed. For example, DDR3-1600 supports 1600 megatransfers per second (MT/s) due to its nature as DDR memory, but runs at 800 MHz.

**Q: What is the difference between crucial ct8g4dfd824a and crucial ct8g4dfs824a?**
A: Thanks for your question. CT8G4DFD824A is a dual ranked part and CT8G4DFS824A is a single ranked part. More information on this can be found here: http://forums.crucial.com/t5/Crucial-memory-for-PC-systems/What-is-a-memory-Rank/ta-p/126346

**Q: If I add a 8gb for my Dell i5675 will it be compatible with the 8gb thats already in my pc?**
A: Thank you for contacting Crucial and for your question.  The part number that you provided is 100% compatible with your system.  That being said, we can guarantee that our memory will work with your computer, but we have no way to guarantee that it will work with what is currently installed in the system.  I can tell you that most consumer systems out there can mix different brands of memory without running into any issues.

**Q: Crucial 8gb single ddr4 2400 mt/s (pc4-19200) dr x8 unbuffered dimm 288-pin memory - ct8g4dfd824a can it compatible with msi gaming h110?**
A: Yes, CT8G4DFD824A is compatible with the MSI H110M GAMING.

## Frequently Bought Together

- Crucial RAM 4GB DDR4 2666 MHz CL19 Desktop Memory CT4G4DFS6266
- Crucial 32GB Kit (16GB x 2) DDR4 3200 MHz (PC4-25600) UDIMM 288-Pin Memory - CT2K16G4DFRA32A
- Crucial 16GB (2x8GB) DDR4 RAM Kit 3200 MHz (PC4-25600), Downclockable to 2933/2666 MHz Laptop Memory SODIMM 260-Pin, Compatible with Intel & AMD Laptops – CT2K8G4SFRA32A

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**Shop now:** [https://www.desertcart.com.au/products/340397392-crucial-4gb-ddr4-sdram-memory-module-4-gb-ddr4-2666](https://www.desertcart.com.au/products/340397392-crucial-4gb-ddr4-sdram-memory-module-4-gb-ddr4-2666)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-19*