I'm currently building a computer, primarily for gaming. I was told that 8GB is good enough so I bought one stick of HyperX Fury DDR4 RAM at 8GB with 2400MHz. Is this okay, or do I need 2 sticks? I did not realise this may be an issue until now and I have already ordered and received, and therefore I don't want to go out and buy another one as the first was already £60+ excluding P&P.