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I have a 27-inch iMac late 2009 desktop computer and i'm looking to upgrade my ram. The best RAM I can find is a Kingston 2GB, DDR3-1066, PC3-8500, CL7, DIMM.

What I currently have is 4GB 1067 MHz Ram

Will this be suitable? Or is this the wrong one?

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You can find out the memory summary by going to:

 > About This Mac > More Info > Memory

enter image description here

Screenshot example

You can also go to Technical Specifications, click "Browse by Product", and enter the serial number of your Mac to see the specs.

It's always a good idea to read the return policy from the vendors, in case the RAM that you bought was not compatible with your computer.

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it should work. i would just make sure you can return it just in case. when you put the new ram in the mac will beep if the ram is not acceptable.

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

    
My Mac doesn't beep if the RAM is wrong, it sets a different pattern of lights on the mobo. – Tetsujin Jan 15 '15 at 20:41

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