So I am buying a Dell Inspiron 7577 laptop which comes with 8GB of DDR4 RAM clocked at 2400 mhz, I want to install another module in the empty slot. My budget is 5k, cant spend more than that. In that budget, I only see either 4GB 2400 mhz or 8GB 2133 Mhz RAM being available. My question is does the speed have that much impact? Or would i be better off running 16gb at 2133 mhz vs 12gb at 2400 mhz. Main use is gaming and running R and Python