i7 is great CPU for games. If you know what games can use it. For me only cities skylines can really use 90% of it if you build really really big city and run tons of mods. That is a must for me because i love sim games and big sim games eat lot of cpu. ED? Not so much. I'd say i3 would rarely be problem here i5 is 100% safe choice lastly i7 is overkill for ED unless they are planning to use 8 threads to full for some reason. i7 performance is about 100% in 4 physical cores and additional 30% in logical threads. I benchmarked it in few programs and ht gave me about 20-30% more points. So if task manager shows 50% CPU usage then you can be sure that your cpu runs pretty much 75-80% of it's total computing power.