I tried to add 16gb to MBP mid 2012 (non retina)

When trying to upgrade to 16gb MBP the result was disastrous. The system would become frozen on a scrambled (and flashing, not artifacts) screen with part of the window and part of the desktop intermixed. Since going back to the 8gb of the same manufacturer memory (corsair) I haven't had any problems. Is there something I can do to check the memory? In the "about this mac" window the 16gb was shown and listed as "ok"

Any ideas what could be the problem?

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I don't have any idea, but you may check your RAM installation and try to reinstall both memory modules again. I have added 16GB RAM into my MBP 13" 2012 only few days ago and everything is working flawless. I used Crucial dual-voltage chips. Your RAM should be PC3-12800 (1600MHz) supporting 1.35V power. Check if your modules meets this specification.

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Now I see.. The voltage is of the memory is 1.5v rather than 1.35v.... Even though everything else is the same apparently that voltage different is causing the problems.

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That low power memory modules are called DDR3L so check for these :-)

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