Honestly, you could get away with it but you'd be wasting your money by not investing in more with a CPU and GPU like those. 8 vs 16gb is what, a $40 difference?
Not to mention, 8GB is not so much the gaming standard anymore. Most newer games will run smoothly with 8 until you up the processes running at a time, at least in my experience. I would strongly recommend 16GB for more modern gaming.