Hi there. I am new to this forum so please be gentle. I'm not sure if this post is in the right section. I just received my gaming pc today and am very happy with it so far. I was working to a budget and would like to upgrade from 8GB of ram to 16GB ram some time next year. My current ram is a CORSAIR VENGEANCE LPX 8GB DDR4 2133MHZ. My question is can you purchase this same ram by itself?. I have seen the same ram sold in pairs but not this one. If yes could you please tell me where this can be purchased from and how much please. Thanks.