Want to upgrade my iMac 21.5 inch, Late 2013. Will this work? Ssome versions of the module are 1.35Volts and others are 1.5v. which do I need?

8GB 1600MHz DDR3 (PC3-12800) - 2x4GB

8GB 1600MHz DDR3 (PC3-12800) - 2x4GB

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