---
product_id: 115533816
title: "Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green"
brand: "micron"
price: "$97"
currency: NZD
in_stock: true
reviews_count: 8
category: "Micron"
url: https://www.desertcart.nz/products/115533816-crucial-ram-ct4g3s1339m-4-gb-ddr3-1333-mhz-cl9-memory
store_origin: NZ
region: New Zealand
---

# 1333 MHz DDR3 speed 4 GB SO-DIMM capacity Low voltage 1.35 V/1.5 V Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green

**Brand:** micron
**Price:** $97
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your Mac’s memory game — because speed waits for no one!

## Quick Answers

- **What is this?** Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green by micron
- **How much does it cost?** $97 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/115533816-crucial-ram-ct4g3s1339m-4-gb-ddr3-1333-mhz-cl9-memory)

## 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

- • **Plug & Play Upgrade:** No tech skills needed—easy install with step-by-step guides
- • **Trusted Micron Quality:** Backed by 42 years of memory expertise and rigorous testing
- • **Boost Multitasking Power:** Run multiple apps and heavy workflows without lag
- • **Seamless Mac Compatibility:** Engineered and certified for flawless iMac & MacBook integration
- • **Energy Efficient Performance:** Low voltage design keeps your Mac cool and power-smart

## Overview

The Crucial CT4G3S1339M is a 4 GB DDR3 1333 MHz SO-DIMM memory module designed specifically for Macs, offering reliable, low-voltage performance with easy installation and Micron’s trusted quality assurance. Perfect for professionals seeking a smooth, responsive multitasking experience on iMacs and MacBooks.

## Description

Buy

Review: Worked perfectly in my iMac 27" (Late 2012 - 3.4GHz Core i7) - Bought my iMac March 2013 from Apple Store and configured all extras apart from additional memory because the store price from Apple was extortionate and I had researched on YouTube how easy it is to replace the memory in the iMac 27" model (unlike the 21.5" model). I ordered 2 kits totalling 32GB (4x8GB) because the iMac 27" has 4 memory slots. They arrived promptly and were well packed in sturdy plastic cartons so the modules were well protected and a little tricky to get out but if you pop them out from behind you won't damage them - just make sure you discharge any static and always hold the modules on the edge. I suggest leaving the modules in their packaging until you have removed the memory module cover on the back of the iMac. To install the memory modules you need to lay your iMac screen down on a flat surface (use a soft cloth to protect from scratches - an empty pillow case works just fine). Remove the power cord to get access to the little push button to release the memory module cover. I used the flat end of a screwdriver to push this in hard in order to pop off the cover. Once opened there are two catches holding the existing memory in place (in my case 2x4GB). Pull these catches towards you to release the grip on the modules. Carefully pull out the modules one at a time. Remove all modules before installing any new ones. Now install the new memory modules using the reverse technique. There is a little notch along the edge with the pins so it's impossible to install them the right way around. If you buy more than 1 pack I would recommend you install each pack together i.e. don't mix them in the slots. When installing my modules I found they were a really tight fit and I had to force them in. This could be down to the positioning of the notch above. It seemed easier when installing the modules in the slots from which I took out the old memory. Perhaps the engineer at Apple had the same problem and once forced in initially they become easier to install. I did try to pull them out again but they seemed to be stuck fast...so didn't try again on the basis I've maxed out the memory so don't intend to remove. Push the leaver forward once all modules are installed - it won't click into place if you have not properly installed the memory per the above. Clip the memory cover back in place and power on your iMac. My beeped repeatedly first time suggesting the modules were not fully clipped in. I opened back up and push each modules firmly back in their slots, replaced the cover and booted up again - BINGO all 32GB recognised and has been running sweet every since with no reported system issues and boy coupled with the Fusion drive I spec'd this machine now flies. I looked at several different supplier included non-Apple certified modules from Crucial but decided that if I am going to spend £150+ on memory for an iMac that cost significantly more then it's worth paying the extra to have the reassurance that Apple engineers have certified these memory modules for iMac. It was a toss up between Corsair and Crucial but on the whole I felt that more customers provided positive review comments for Crucial (not just the star rating) and besides when I upgrade my MacBook Pro memory recently I purchased Crucial and have not had any issues with them for over 18 months now. As others have stated on reviews before if you already have 16GB then the performance uplift from 16 to 32 will not be as noticeable as the jump from 8 to 32 obviously but improving your iMac memory by 50% has to be a wise investment given that memory is one of the most cost effective and only ways of upgrading an iMac 27". For gamers out there the main reason I pushed memory up to 32GB was to run some of the triple A games at high frame rates. I spec'd the NVIDIA GeForce GTX 680MX 2GB and this machine now runs Gotham City, COD Black Ops etc flawlessly. Running video editing and ripping software along with multiple other office applications concurrently now is a breeze with no noticeable slow down - and I multi-task heavily with workflow on my iMac.
Review: A much-needed upgrade. - This memory is listed as "Mac compatible" which I figured is just a marketing blurb and all of its specs matched what I required for my (Windows) laptop, so I figured I'd take the chance and buy these after my first attempt failed with a different brand of RAM, some time prior. I was skittish about booting with a different amount of RAM from hibernation, so I shut it down completely and performed the replacement. Pretty standard stuff. As another reviewer has mentioned, be sure to wait a while for the initial boot after RAM installation to complete!! It can take a while, your system/the RAM is not necessarily broken. Maybe have a snack or take a peek at the television or phone for a few minutes while your computer does its thing. After the initial lengthy boot, you will have your normal boot times back again on subsequent boots/restarts. Anyway, this new RAM works great! I finally have enough memory to accommodate all of the programs I like to run simultaneously, such as monstrous browser sessions that can easily eat 2GB of memory a piece. My system would slow to a crawl on 4GB, as it simply wasn't enough. Now it's perpetually responsive. As with all RAM upgrades though, you'll only notice a particular performance increase if you didn't have enough to start with, but you could always use the spare memory as a RAM drive for ludicrous temporary storage speeds. For determining compatibility, it can be slightly complicated. If you look up your system's processor/motherboard on the manufacturer's site, it can usually give you precise details on what type of memory - and how much of it - is compatible with your system. It's what led me to this product in particular. I think Crucial also has a web-app that can help you determine compatibility by providing it with your computer's model. Overall, very pleased with this purchase.

## Features

- Improve your system's responsiveness, run apps faster and multitask with ease
- Install with ease; no computer skills required. How-to guides available at Crucial
- Compatibility assurance when using the Crucial System Scanner or Crucial Advisor Tool
- Micron quality and reliability is backed by superior component and module level testing and 42 years of memory expertise
- ECC Type = Non-ECC, Form Factor = SODIMM, Pin Count = 204-pin, PC Speed = PC3-10600, Voltage = 1.35 V/1.5 V, Rank and Configuration = 2R x 8

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008LTBKKQ |
| Best Sellers Rank | 49,351 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 287 in Computer Memory |
| Brand | Micron |
| Colour | Green |
| Customer Reviews | 4.6 4.6 out of 5 stars (18,459) |
| Date First Available | 15 Jan. 2011 |
| Form Factor | SO-DIMM |
| Guaranteed software updates until | unknown |
| Hard Drive Interface | Serial ATA |
| Item Weight | 9 g |
| Item model number | CT4G3S1339M |
| Manufacturer | Micron |
| Memory Clock Speed | 1333 MHz |
| Memory Technology | DDR3 |
| Operating System | MAC |
| Processor Brand | Refer_Manual |
| Processor Type | Unknown |
| Product Dimensions | 17.78 x 1.12 x 12.7 cm; 9 g |
| RAM Size | 4 GB |
| Series | Crucial DDR3L 1333 MT/s for Mac |
| Voltage | 1.35 Volts |

## Product Details

- **Brand:** Micron
- **Compatible devices:** Notebook^Mac compatibility
- **Computer memory size:** 4 GB
- **Memory speed:** 1333 MHz
- **RAM memory technology:** DDR3

## Images

![Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green - Image 1](https://m.media-amazon.com/images/I/51zCRzd8S+L.jpg)
![Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green - Image 2](https://m.media-amazon.com/images/I/616uOdBta4L.jpg)
![Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green - Image 3](https://m.media-amazon.com/images/I/71WOSiiDLAL.jpg)
![Crucial RAM CT4G3S1339M 4 GB DDR3 1333 MHz CL9 Memory for Mac , Green - Image 4](https://m.media-amazon.com/images/I/71v2HApUVAL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked perfectly in my iMac 27" (Late 2012 - 3.4GHz Core i7)
*by C***Y on 28 March 2013*

Bought my iMac March 2013 from Apple Store and configured all extras apart from additional memory because the store price from Apple was extortionate and I had researched on YouTube how easy it is to replace the memory in the iMac 27" model (unlike the 21.5" model). I ordered 2 kits totalling 32GB (4x8GB) because the iMac 27" has 4 memory slots. They arrived promptly and were well packed in sturdy plastic cartons so the modules were well protected and a little tricky to get out but if you pop them out from behind you won't damage them - just make sure you discharge any static and always hold the modules on the edge. I suggest leaving the modules in their packaging until you have removed the memory module cover on the back of the iMac. To install the memory modules you need to lay your iMac screen down on a flat surface (use a soft cloth to protect from scratches - an empty pillow case works just fine). Remove the power cord to get access to the little push button to release the memory module cover. I used the flat end of a screwdriver to push this in hard in order to pop off the cover. Once opened there are two catches holding the existing memory in place (in my case 2x4GB). Pull these catches towards you to release the grip on the modules. Carefully pull out the modules one at a time. Remove all modules before installing any new ones. Now install the new memory modules using the reverse technique. There is a little notch along the edge with the pins so it's impossible to install them the right way around. If you buy more than 1 pack I would recommend you install each pack together i.e. don't mix them in the slots. When installing my modules I found they were a really tight fit and I had to force them in. This could be down to the positioning of the notch above. It seemed easier when installing the modules in the slots from which I took out the old memory. Perhaps the engineer at Apple had the same problem and once forced in initially they become easier to install. I did try to pull them out again but they seemed to be stuck fast...so didn't try again on the basis I've maxed out the memory so don't intend to remove. Push the leaver forward once all modules are installed - it won't click into place if you have not properly installed the memory per the above. Clip the memory cover back in place and power on your iMac. My beeped repeatedly first time suggesting the modules were not fully clipped in. I opened back up and push each modules firmly back in their slots, replaced the cover and booted up again - BINGO all 32GB recognised and has been running sweet every since with no reported system issues and boy coupled with the Fusion drive I spec'd this machine now flies. I looked at several different supplier included non-Apple certified modules from Crucial but decided that if I am going to spend £150+ on memory for an iMac that cost significantly more then it's worth paying the extra to have the reassurance that Apple engineers have certified these memory modules for iMac. It was a toss up between Corsair and Crucial but on the whole I felt that more customers provided positive review comments for Crucial (not just the star rating) and besides when I upgrade my MacBook Pro memory recently I purchased Crucial and have not had any issues with them for over 18 months now. As others have stated on reviews before if you already have 16GB then the performance uplift from 16 to 32 will not be as noticeable as the jump from 8 to 32 obviously but improving your iMac memory by 50% has to be a wise investment given that memory is one of the most cost effective and only ways of upgrading an iMac 27". For gamers out there the main reason I pushed memory up to 32GB was to run some of the triple A games at high frame rates. I spec'd the NVIDIA GeForce GTX 680MX 2GB and this machine now runs Gotham City, COD Black Ops etc flawlessly. Running video editing and ripping software along with multiple other office applications concurrently now is a breeze with no noticeable slow down - and I multi-task heavily with workflow on my iMac.

### ⭐⭐⭐⭐⭐ A much-needed upgrade.
*by A***R on 29 July 2017*

This memory is listed as "Mac compatible" which I figured is just a marketing blurb and all of its specs matched what I required for my (Windows) laptop, so I figured I'd take the chance and buy these after my first attempt failed with a different brand of RAM, some time prior. I was skittish about booting with a different amount of RAM from hibernation, so I shut it down completely and performed the replacement. Pretty standard stuff. As another reviewer has mentioned, be sure to wait a while for the initial boot after RAM installation to complete!! It can take a while, your system/the RAM is not necessarily broken. Maybe have a snack or take a peek at the television or phone for a few minutes while your computer does its thing. After the initial lengthy boot, you will have your normal boot times back again on subsequent boots/restarts. Anyway, this new RAM works great! I finally have enough memory to accommodate all of the programs I like to run simultaneously, such as monstrous browser sessions that can easily eat 2GB of memory a piece. My system would slow to a crawl on 4GB, as it simply wasn't enough. Now it's perpetually responsive. As with all RAM upgrades though, you'll only notice a particular performance increase if you didn't have enough to start with, but you could always use the spare memory as a RAM drive for ludicrous temporary storage speeds. For determining compatibility, it can be slightly complicated. If you look up your system's processor/motherboard on the manufacturer's site, it can usually give you precise details on what type of memory - and how much of it - is compatible with your system. It's what led me to this product in particular. I think Crucial also has a web-app that can help you determine compatibility by providing it with your computer's model. Overall, very pleased with this purchase.

### ⭐⭐⭐⭐⭐ Amazing memory. Wish I did this sooner. My laptop operates like a dream now.
*by M***E on 23 June 2020*

I have had my laptop for about 7/8 years and 8GB ram and macOS Sierra were just not cutting it anymore. Feels like I have a new laptop (especially with the update to macOS Catalina). It's a lot faster and nothing lags anymore. Quick 5 minute install if you've done it before and very easy if you haven't, trust me. I considered buying a new laptop as working from home now means I need to squeeze a lot out of this old boy but the RAM has really done it's job and I think I can use this for another 2/3 years or at least until the CPU gives up. Better to spend £80 than £2500 on a new laptop. From the pictures you'll see that - I have a mid 2012 MBP with 2.5GHz Dual core i5, Samsung 840 Pro SSD as the main HDD and have replaced my optical drive with an additional HDD. Now running a "pseudo-super" MBP (the bottleneck is now my cpu lol) If you have a 2013 MBP please try and do as much upgrades as you can! With each one it feels like you actually bought a new laptop.

## Frequently Bought Together

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- Crucial MX500 1TB 3D NAND SATA 2.5 Inch Internal SSD, up to 560MB/s - CT1000MX500SSD1

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-02*