“The computer memory is pre - installed with 4gb DDR4. If I need total of 8GB Memory, do I need additional 4GB memory or a single 8GB memory module for replacement?”

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• Model number 90G90068U has two RAM memory slots. You can add an additional 4GB RAM stick for a total of 8GB DDR4-2666MHz.

  Answered by Lenovo Product Expert 6 years ago

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• Get the 8gb single stick. It also upgrades to 16gb by single stick. The second input will not function.

  Answered by lw1651 6 years ago

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