Is this a good build for 4k gaming

hey get this right now it is expansive due to global crisis and it is not available in stock so wait for a week and get this version it will be like $678 because when make a build guide about 5 days it was for $675 and the rest is fine
 
You will be able to do 4k gaming at medium settings and 30+ fps. Also you will need to overclock your cpu and add more ram soon. Don't worry about ram, you can buy one more dimm of 4 gb. Also, keep in mind that it would better to buy a better psu.