Upgrage 12400F for an RX6800

Hello, I have an RX6800 with an Intel 12400f. I'd like to upgrade my processor. I've considered the 14400f, but is it worth it? Maybe I should get a more powerful processor? Or is it not necessary to upgrade? I have 16GB of DDR4 RAM, should I upgrade to 4x8GB? Thanks for your feedback.