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Hi,
I'm sure this has been asked before, but when doing a search there were so many results, and none of the ones I clicked actually said what type needed :D

What type of Ram chip is needed for a 21.5 mid 2011 iMac?

Would this work? http://www.ebay.co.uk/itm/8GB-RAM-MEMORY-UPGRADE-FOR-APPLE-iMAC-2-8GHz-INTEL-QUAD-CORE-i7-21-5-MID-2011-/200656104990?pt=UK_Computing_ComputerComponents_MemoryRAM_JN&hash=item2eb8092e1e

According to Crucial you need DDR3 PC3-10600, DDR3 SODIMM, so yes the one you linked would work.
 
Thank you very much Weaselboy, I shall order some now, ready for when my iMac gets here :D
 
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