|RAM||8 GB DDR3 SDRAM|
|Memory Speed||1333 MHz|
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Crucial 8GB Kit (4GBx2) DDR3 / DDR3L 1333 MT/s (PC3-10600) CL9 204-Pin SODIMM Memory For Mac CT2K4G3S1339M (Notebook)
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- Increases system performance
- Compatible with Mac Systems
- Premium quality memory from a trusted brand
- DDR3 Low Voltage / DDR3L DRAM
- Limited Lifetime Warranty
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From the manufacturer
- Improve responsiveness
- Run apps faster
- Multitask with ease
- Compatible with more than 70 Mac system models
Compatible With Mac Systems*
Take the guesswork out of upgrading your Mac with Crucial memory for Mac systems. Since Apple computers often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it’s important to use memory that’s engineered for your Mac. With more than a decade of experience manufacturing and developing memory for all types of Apple computers, trust Crucial memory to optimize your Mac system’s performance.
Reliability for Mac systems
When you use your Mac system, you expect intuitive, dependable performance. And if you’re a Mac Pro user, you expect mission-critical workstation reliability. Expect the same out of your memory. Every module that leaves our doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility. Even better, modules are lead and halogen-free.*
Speed and energy efficiency for Mac systems
A memory upgrade is the fastest, easiest, and most affordable way to get more performance out of your Mac system. Standard DDR3 modules help Mac systems reach speeds up to 1600 MT/s. For newer Mac systems, DDR3L modules are available. These modules deliver speeds starting at 1866 MT/s and use 10% less power for improved energy efficiency. And get even better system responsiveness with faster speeds, bandwidths, and performance for systems that support DDR4 memory technology, like the latest iMacs
Support for Mac systems
Unsure how to install memory or have an important question about your Mac system? Let our team of experts help! Our team knows Apple systems and requirements inside and out, and we’ll provide the technical support you need – no matter which Mac system you’re using. From phone support, videos, FAQ articles, and do-it-yourself install guides for more than 70 different Mac systems, we’ve got the resources you need to keep your system up to speed.
Micron quality - a higher level of reliability.
As a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory for Mac systems is backed by the same quality and innovation that has produced some of the world’s most advanced memory and storage technologies. With a product portfolio that includes upgrades for more than 100,000 systems, we’ve got one specifically designed for your Mac system.
*DDR3 and DDR3L modules only.
Note that per Apple manufacturer specifications, memory can’t be upgraded on (a) many Mac systems made after mid-2012 and (b) retina-based models. Before upgrading your memory, consult your owner’s manual to verify that an upgrade is possible.
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||$3.65||FREE Shipping||FREE Shipping|
|Capacity||8 GB||8 GB||8 GB||—||8||8 GB|
|RAM Size||8 GB||4 GB||8 GB||8 GB||8 GB||4 GB|
|Item Dimensions||4.49 x 7 x 5 in||0.48 x 0.18 x 0.94 in||0.44 x 7 x 5 in||1.57 x 4.33 x 0.39 in||4.75 x 6 x 0.3 in||4.49 x 7 x 5 in|
|Memory Clock Speed||1,333 MHz||1,333 MHz||1,600 MHz||1,333 MHz||1,333 MHz||1,600 MHz|
|Memory Speed||1,333 MHz||1,333 MHz||1,600 MHz||1,333 MHz||1,333 MHz||1,600 MHz|
|Memory Storage Capacity||4 GB||8 GB||4 GB||8 GB||4 GB||4 GB|
|Number of Items||2||1||2||—||1||2|
|Number of Pins||204||204||204||204||204||204|
|RAM Technology||DDR3 SDRAM||DDR3 SDRAM||DDR3 SDRAM||DDR SDRAM||DDR3 SDRAM||DDR3 SDRAM|
|Size||8GB KIT (4GBx2)||8 Gb||8GB KIT (4GBx2)||8 Gb||8 GB||8GB KIT (4GBx2)|
|RAM Type||DDR3 SDRAM||DDR3 SDRAM||DDR3 SDRAM||DDR3 SDRAM||DDR3 SDRAM||DDR3 SDRAM|
CT2K2G3S1339M is a 8GB kit consisting of (2) 4GB DDR3 Notebook modules that operates at speeds up to 1333 MT/s and has a CL9 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non-ECC. It conforms to the industry standard SODIMM layout of 204 pins and is compatible with computers that take DDR3 SODIMM memory.
Top customer reviews
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Despite the Apple documentation claiming that 16 is the maximum capacity for this model, I researched and found that you can max out to up to 32 GB.
For those people that have no clue (like me), the installation was really easy:
1 - Turn off your iMac. Touch the iMac frame to discharge you (electrostatic), and unplug it from A.C. Place your iMac "face down" in a towel.
2 - unscrew the 3 bolts from the memory bay at the bottom of the iMac, remove the memory cover.
3 - leave the 2 RAM modules in their slots (I had 2 RAM modules, of 2 GB each).
4 - Insert the NEW 2 RAM modules (8 GB each) in the 2 available slots.
5 - Screw the 3 memory cover bolts, get it up back in place and turn it on. That's it.
By looking at the "About this Mac > Memory" screen, I went from:
[ 2 GB ] [ 2 GB ]
[ ] [ ]
[ 2 GB ] [ 2 GB ]
[ 8 GB ] [ 8 GB ]
Hope this helps!
I went with 16GB-ram upgrade, 4x4GB, and the difference is breathtaking. Although we should agree that such quantities of ram should be unneeded on a UNIX-compliant system, it has kept me from prematurely upgrading to new hardware.
Lookup: G74SX-91131Z-32GB uk
The question for me was, what is the right spec of ram? 1.35v or 1.5v? With these chips it doesn't matter as it is dual voltage. I did know I needed 1333mhz, according to the posters on the Asus ROG forum, which also follows the specs for my original ram. But most importantly, I saw another reviewer here that said she was able to use 16gb of this ram in her G74SX so I knew I would be safe.
I ran memtest86 on this ram for 22hrs and it got through 3 of 4 passes with no errors. After that amount of time, I just gave up and called it a day. FYI, memtest86 calls this chip out as 666mhz. DDR stands for double data rate which was explained to me by the developer of memtest86. So 666 equals 1333.
The bottom line for me is with $150 worth of these chips and a used $60 windows 7 anytime upgrade, I've successfully doubled my memory. Not bad for a 4 year old laptop.
CAUTION: 1. The screws are very small. Be careful not to lose them. (2) 3 of screws are longer. Apple's illustrations in its instructions show where they are located.