I have an Alienware Alpha with an I7 4785T CPU and 8 GB of DDR3 (?) RAM. I want to upgrade to 16 GB and I bought PNY Anarchy DDR4 16 GB (2x8 GB) RAM with a frequency of 2400MHz. Frequency speed is PC4-19200. Will this work okay in my computer? If not, can someone give me a link to one that will?