While the 7400k doesn't exist, the 7400 (non-oc) does. Honestly, you'll be fine unless you start getting Thermal Throttling (When the CPU gets too hot so it slows itself down to prevent damage). And, your temperatures might depend on the cooling system, thermal compound, airflow, GPU cooling style to size of your case. You'll be safe from throttling as long as your temps usually stay below 90 degrees Celsius on your CPU and below 87-88 degrees Celsius on your GTX 1060.