iMac Intel 27" EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz) ID iMac11,1

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memory upgrade has to be paired?

hi there i have a question.

do i need to put two memory cards in my imac or can i leave the 2gbx2 and

put one 4gb in to?

so i will have 8 gb.

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You can add just one at a time. You loose a little bit from not getting interleaving but the cost savings more than makes up for the little loss. But you will have 6GB, a 2 and a 4, not 8 GB.

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