i upgraded my macbook pro late 2011 to 16gb (8+8) and systems only recognising it as 8gb (4+4) i have tried removing both modules and tried re-inserting them and still showing the same and they are the correct spec for my mac. any ideas?
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upgraded ram on macbook pro to 16gb but only showing 8gb
- Thread starter jaygoldman
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1333 MHz DDR3 and kingston said it take up to 16gb
http://www.kingston.com/en/memory/search?DeviceType=3&Mfr=APP&Line=MacBook Pro&Model=74790
http://www.kingston.com/en/memory/search?DeviceType=3&Mfr=APP&Line=MacBook Pro&Model=74790
- All 2011 models accept 16GB.
Those Kingston modules should work. How does it react with only one of them installed? What about one 8GB and one of your original modules (2GB, I'm guessing)?
Where did you buy the modules? Ebay? Is there any chance of you have bought counterfeit modules?
- I'm going to guess the modules are defective. RMA them for a replacement or refund.
No - modules either work or don't for the most part. The OP thinks he has 16GB of RAM but he only have 8GB - 4x4 instead of 8x8.
Chances of 2 defective modules in that way is pretty slim...I'd guess they are actually 4GB modules mislabelled that have crept past Crucials supply chain QA.
Or you have a defective memory address line in your MBP - that might be the case as it would only be used when 8GB modules are fitted, it wouldn't error on 2 or 4GB modules???
- That's certainly possible as well. But let's not blame Crucial for Kingston's mistake.
In any event, they're not as described and should be returned. If the replacement modules also don't get recognised as 8GB, the problem is likely with the machine.
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But let's not blame Crucial for Kingston's mistake.
Who would do that. Unless he bought Kingston RAM from Crucial?
Oh no, different peep saying he used Crucial, how confusing LOL