Hello. I am thinking of adding another stick of ram and possibly an EVGA GTX 1660 graphics card. My PSU is a Rosewill Capstone 550w Gold Plus Certified, found here https://www.newegg.com/Product/Product.aspx?Item=N82E16817182262. I was wondering if this PSU could handle this. Here is my current build: https://pcpartpicker.com/list/krQzQZ.