No.  The CPU controls the memory speed --  if you install 3200 MHz RAM, it will downclock to the current speed.  
I currently have 2x 8gb 2666mhz CL15 installed, is upgrading to 2x 8gb 3200mhz CL22 going to be better for my laptop?
Does Inspiron 3593 (No discrete graphics) support DDR4-3200mhz?