Hi there. I bought the CT2K8G3S1339M 16Gb kit from amazon three months ago. All good until a few days ago when my iMac started crashing. Several reboots later I got three beeps indicating the RAM was bad. As I had the 16Gb kit installed along with the original 4Gb of RAM, I removed the original RAM to see if I could confirm which kit was the problem. The machine crashed when the 16Gb kit was installed but not when the 4Gb kit was installed. Is there any more testing I need to do to confirm the RAM is defective? Given I bought this from Amazon US and live in Australia, how do I effect the warranty?
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