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Kingston has a KTA series (Kingston Tested for Apple). I'm not sure if it's just marketing, but I would prefer that type.
Anyways, the most important thing is you have the SO-DIMM with this specifications:
  • PC3-12800
  • Unbuffered
  • Nonparity
  • 204-pin
  • 1600MHz DDR3 SDRAM
So I guess the Valueram you mentioned should work. Make sure you can return or swap it at the reseller if it doesn't work properly.
 
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My daughters 27" iMac has 8 GB. I want to upgrade that.

The model is.:
iMac (27'', late 2013)
Model-id: iMac14,2
Processornavn: Intel Core i5
Processorhastighed: 3,2 GHz

Is this the RAM I need to buy?

http://cdon.dk/hjemme-elektronik/ki...m-ddr3l-pc12800-1600mhz-cl11-lv-4gb-p26782621

Hope for an answer and thank you :)

Is that a 21 inch or 27 inch. The 21 inch is very difficult to upgrade the ram.

https://www.ifixit.com/Teardown/iMac+Intel+21.5-Inch+EMC+2638+Teardown/17829

Also have you checked her RAM usage to see if it will be any help??? If her RAM pressure graph stays in the green it will make little to no difference to you upgrading the RAM and an SSD will provide a much better performance boost.
 
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I would not upgrade the RAM. 8GB is already a lot, so you won't see any difference in the way the computer works. If you put in an SSD you will see a night and day difference. It'll be very very fast.
 
I would not upgrade the RAM. 8GB is already a lot, so you won't see any difference in the way the computer works. If you put in an SSD you will see a night and day difference. It'll be very very fast.

8 GB in 2015 isn't that much, if you do a lot at once, and she already has a SSD drive, but thanks for the advice :)
 
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