Can I use 8GB DDR3 1600 RAM in a late 2011 MacBook Pro? - ehMac.ca
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Old Sep 11th, 2015, 08:03 PM  
krs
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Can I use 8GB DDR3 1600 RAM in a late 2011 MacBook Pro?

I bought two 8 GB sticks of Crucial DDR3 1600 RAM which I was originally going to use in a late 2012 Mac Mini.
Now i'm thinking of using one of those sticks in a late 2011 MacBook Pro.
I realize the RAM would run slower in that Mac, but will it work or can I expect problems mixing one 8GB stick of this higher speed RAM with one existing stick of the original 2GB RAM ?
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Old Sep 11th, 2015, 10:12 PM  
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I tend to believe that will run. https://discussions.apple.com/thread/4597952?tstart=0
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Old Sep 12th, 2015, 12:55 PM  
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It looks like it's compatible if I picked your correct MBPro model:
Apple MacBook Pro "Core i7" 2.2 15" Late 2011 Specs

RAM Type: PC3-10600 DDR3 Min. RAM Speed: 1333 MHz
Details: Supports 1333 MHz PC3-10600 DDR3 SDRAM.

Standard RAM: 4 GB Maximum RAM: 16 GB*
Details: 4 GB of RAM is installed as two 2 GB modules, no slots free.

*Apple officially supports a maximum of 8 GB of RAM, but third-parties have determined that this model actually is capable of using up to 16 GB of RAM with two 8 GB memory modules.


MacBook Pro "Core i7" 2.2 15" Late 2011 Specs (Late 2011 15", MD318LL/A, MacBookPro8,2, A1286, 2563*) @ EveryMac.com
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Old Sep 12th, 2015, 03:08 PM  
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It will run.
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Old Sep 26th, 2015, 02:01 PM  
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Quote:
Originally Posted by krs View Post
I bought two 8 GB sticks of Crucial DDR3 1600 RAM which I was originally going to use in a late 2012 Mac Mini.
Now i'm thinking of using one of those sticks in a late 2011 MacBook Pro.
I realize the RAM would run slower in that Mac, but will it work or can I expect problems mixing one 8GB stick of this higher speed RAM with one existing stick of the original 2GB RAM ?
It will run if the RAM is programmed correctly to re-clock at 1333. Crucial in particular is selling Low Voltage 1600 MHz for virtually all of the machines that they support which take 1333 MHz RAM. (although it is worth noting that they still produce actual 1333 MHz and 1066 MHz SODIMMs in their Mac specific model lines)

The other thing to note is the chip count on the modules. Kingston and other companies have gone to a high density chip build to cut costs, where they will have only 4 or 8 chips on the module rather than 16. Many machines (Macs and many PCs) cannot take high density, and to be safe we only offer low density, 16 chip builds for Macs.

For the Crucial generic modules, the models ending in M (for Mac) are safe, the models ending in B are probably OK and the models ending in BJ are definitely risky, as the BJ models are high density.
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Old Sep 26th, 2015, 03:16 PM  
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Thnaks for the detailed reply, much appreciated.

I haven't had a chance yet to install the RAM or even look at it.
It was originally meant for my latest Mini which takes 1600 MHz RAM but I think the MacBook needs it more when I upgrade to OS 10.10

BTW - Is this a good time to buy RAM?
Seems prices are lower than what I remember from a while back.
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Old Oct 14th, 2015, 12:31 PM  
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Thnaks for the detailed reply, much appreciated.

I haven't had a chance yet to install the RAM or even look at it.
It was originally meant for my latest Mini which takes 1600 MHz RAM but I think the MacBook needs it more when I upgrade to OS 10.10

BTW - Is this a good time to buy RAM?
Seems prices are lower than what I remember from a while back.
RAM has been sliding down in price lately, so its not a bad time. We're now carrying 5 different brands of Mac RAM so we can choose the most advantageous price on any given week

At the same time the dollar has been volatile and mostly down vs the US$, so there has been an upward pressure on many component prices.
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