If I already have 2GB RAM and I buy 4GB RAM, does the 4GB add or replace the current 2GB? (Will I end up with 4GB or 6GB total RAM?)

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If I already have 2GB RAM and I buy 4GB RAM, does the 4GB add or replace the current 2GB? (Will I end up with 4GB or 6GB total RAM?)

I currently have Mac OS X 10.6.8 and I wish to upgrade to Mountain Lion, but I have read that I need first to get more RAM. Seeing that you can't buy it from the apple store anymore, I have looked at buying from a 3rd party site such as crucial.com or eshop.macbook.com.

What I don't understand is If I already have 2GB RAM and I buy 4GB RAM, does the 4GB add or replace the current 2GB? (Will I end up with 4GB or 6GB total RAM?).

Thanks

Kirstie

Posted on Jun 21, 2014 2:13 AM

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Answer 1

Csound1

Level 9

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Jun 21, 2014 2:19 AM in response to ksjames

It replaces the current Ram, you'll have 4GB, but if your Mac is capable I would upgrade it to 8GB (2 x 4GB chips) and I would buy them from OWC (macsales.com)

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Answer 2

ksjames Author

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Jun 21, 2014 2:24 AM in response to Csound1

Wow thanks for the instant response. I'm pretty sure that it can only use 6GB. So I guess I can keep the current 2GB, buy a 4GB and have a total of 6GB? That's given that I have two memory slots, am I able to check that without taking my computer apart?

Thanks!

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Answer 3

Csound1

Level 9

60,063 points

Jun 21, 2014 2:28 AM in response to ksjames

I don't recommend that, Macs run better with Ram in matched pairs, even if they can't use all of it (although it is cheaper your way). If you do buy just one chip ensure that it matches the existing 2GB chip in all parameters (except capacity of course)

Go to OWC and check what they recommend, buy from them, they are the best.

I'd buy 2.

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Answer 4

andyBall_uk

Level 7

20,516 points

Jun 21, 2014 4:18 AM in response to ksjames

You're right that some models will not take 8GB, and so should check with OWC.

http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/Macbook_ selector

If you have one x 2GB module currently, then buying a single 4GB would add to it, for a total 6GB. If price is a concern, the 4GB (2 x 2GB) is perhaps $40 cheaper, and may well be sufficient, depending on the apps you use.

You can check exactly what is currently installed from the Apple menu at top left of the screen - About This Mac - More Info... - Memory

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