First off, I am going to buy a ram upgrade for my computer. Second, I want to know if my factory installed ram will be able to be used in addition to the upgrade. According to the system scanner tool from crucial, I have 2 slots and 1 4gb stick. My system is a Toshiba C55DT-A5106, and the RAM upgrade I am considering is here. Also, if they are compatible, which should I put in which slot? Thanks in advance for the help.
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