I purchased Corsair RAM memory (2x4GB) CMSA8GX3M2A1066C7 from Amazon.com. According to the description it "Works with any Mac computer that supports 4GB DDR3 SODIMMs". My MacBook supports 6GB officially and 8GB with the firmware that I am running.
However when I inserted my MacBook sounded three beeps at start-up. I tried inserting only one stick in both of the slots but that didn't help. I also tried it with both sticks but that does not work either.
When I plugged in my old RAM it worked perfectly. I also tried another 8GB RAM stick from Crucial with the same specs (CT2CP51264BC1067) and it also worked as expected.
I tried the 2x4GB sticks with my HP laptop (dv6) but I got a blue-screen when booting with the messag IRQL NOT LESS OR EQUAL. The 8GB Crucial RAM works fine in the HP so there must be something wrong with the 2x4GB sticks
Has any of you experienced a similar issue? Is there anything I can do? I already tried PRAM reset.
Unfortunately I cannot return it as I am not in the US anymore.
Best Answer
3 beeps indicate that the RAM didn't pass the system test. As the 2x4GB Corsair RAM also gives you a Blue Screen Of Death on your HP I would say that the RAM is faulty and your only option is to return it.
Try shipping it to a friend in the US or to Amazon.com directly as you're not in the US anymore.