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No, as this is desktop 240-pin RAM and you need notebook 204-pin DDR3 SO-DIMM RAM, regardless of what 27" or 21.5" iMac you have from whatever year it might be. 2009 and 2010 iMacs run with 1066 MHz RAM, but can use 1333 MHz RAM as well, and 2011 iMacs run with 1333 MHz RAM, but you could also mean getting a 2012 iMac, which wants 1600 MHz RAM.
 
No, as this is desktop 240-pin RAM and you need notebook 204-pin DDR3 SO-DIMM RAM, regardless of what 27" or 21.5" iMac you have from whatever year it might be. 2009 and 2010 iMacs run with 1066 MHz RAM, but can use 1333 MHz RAM as well, and 2011 iMacs run with 1333 MHz RAM, but you could also mean getting a 2012 iMac, which wants 1600 MHz RAM.
Hmm so would this one be the one I need if want to get it from amazon:
http://www.amazon.com/Corsair-Chann...=1354674911&sr=8-2&keywords=corsair+16gb+ddr3
 
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No its 1333 Hz. Your mac ships with 1600 hz. Try this stuff.

But does the OP state anywhere what exact iMac model s/he has or gets? I am still confused, as to what exact model s/he talks about and the "pulling the trigger" part gets connected to the RAM in my brain. But then again, this is all just a guessing game anyway.
 
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But does the OP state anywhere what exact iMac model s/he has or gets? I am still confused, as to what exact model s/he talks about and the "pulling the trigger" part gets connected to the RAM in my brain. But then again, this is all just a guessing game anyway.
It's stated in the thread title I'm getting the base spec 27" model

Go for it. Seen this product recommended on other threads here in MR.
So this one will work, the volts thing doesn't matter?
 
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It's stated in the thread title I'm getting the base spec 27" model


So this one will work, the volts thing doesn't matter?

The voltage issue would only really affect laptops as they run on batteries and the relatively higher voltage will drain batteries faster. Your wall powered iMac will be fine.
 
It's stated in the thread title I'm getting the base spec 27" model

Sorry, it is not*, but eagandale4114 understood better than me.

* it is not stated, that you "get" a base iMac, thus it can be confused to you already having one of the many available base iMacs out there from 2009 or 2010 or 2011, but then again, I was never that good at grasping things in short form, I am too old for 140 things and less
 
Sorry, it is not*, but eagandale4114 understood better than me.

* it is not stated, that you "get" a base iMac, thus it can be confused to you already having one of the many available base iMacs out there from 2009 or 2010 or 2011, but then again, I was never that good at grasping things in short form, I am too old for 140 things and less
You're right should have said new base model, anyway thanks guys all set now :D
 
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