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I recently upgraded the memory in my 27" iMac, mid 2011. took out the two, 2 gig in the top slots & put in two 8 gig units. For some reason I wasn't thinking about putting the 2 gig units in the bottom slots. Is this ok? Will it help any?

Thanks

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It will likely work, however many people will advice you to only use matching sticks of RAM. In other words, if you're going to use 4 sticks, ensure they are all of the speed, capacity, brand, etc.

You wouldn't build a RAID array with mismatched drive manufacturers, speeds, and capacities, why do it with your RAM?

  • Actually, neither capacity nor brand are important, if speed, ECC etc all match & each pair are truly identical. My machine runs perfectly happily on a pair of 1s, a pair of 4s, & a pair of 8s, giving the odd total of 26GB RAM. – Tetsujin Oct 24 '14 at 6:59
  • Thanks guys. I think I will install them & see how it goes. – David Oct 24 '14 at 10:10

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