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I need more RAM memory

I posted before about my need for more RAM memory. I have now 3x1 GB. I'm gonna start shopping for 3 modules.


OK, so I will remove the three I have now and put 3 new one, same brand, same company, same size, same speed.

I will go with 3x4 GB.


What do I do with the old three modules? Sell it on ebay?

And now the stupid question of the day: Is there anything on it?

Mac Pro, Mac OS X (10.6.8), Quad-Core Intel Xeon

Posted on May 30, 2015 1:20 PM

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Posted on May 30, 2015 1:21 PM

Yes you can sell them on eBay and no there is nothing on them.

8 replies

May 30, 2015 1:31 PM in response to tony gardino

In older MPs like yours It's best to install RAM in matched pairs.


Mac Pro- How to remove or install memory

Getting memory upgrades right on the Mac Pro


About RAM installation in the Mac Pro



Ram should be installed minimally in matched pairs and optimally in matched quads. This means the memory modules are the same size and specifications. They should also be equipped with the Apple-certified style of heat sink.

Jun 5, 2015 7:31 PM in response to Kappy

Thank you for the links. I read everything.

So I decided to buy 16 GB. I have 2 choices:

16GB (4x4) for $168. But then all slots are used.

Or 16GB (2x8GB) for $184. Advantage: I still have 2 slots empty.

But I wonder why they (Mac Pro Review by Diglloyd) say this here:

"For Mac Pro Quad core users, the following options are recommended for serious work:

12 GB as 3x 4GB module

16 GB as 4x 4GB module."

They don't say 2x 8GB. Why not? They mention 8 GB for 64 GB (8x8 GB) or 48 GB (6x 8GB) why not 2x 8 GB?

Difference between the two 16GB: ($184-$168)= $16 which is nothing.

So the question is: 2 slots or 4slots? And why?

Jun 6, 2015 10:38 AM in response to tony gardino

I strongly recommend that you only purchase the new RAM from either Crucial.com or otherworldcomputing.com. Both have excellent reputations for quality products and guarantee their modules. Macs are picky about RAM specs and many modules don't work even when they meet the specs. Crucial and OWC test their modules in the various Macs.

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I need more RAM memory

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