Installed New Ram, computer cant see it, still thinks old ram is installed

Feb 19, 2018
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Hello, i changed the two sticks of ddr3 2gb Ram in my Z77E-ITX motherboard with two 16gb sticks. After restarting my computer is very slow, it still says i have 4gb total ram, and in the bios it shows my old ram still being installed, is there any reason this is happening. I am running windows 10 64 bit