With regards to the title mentioned (AMD A6-7400K for AutoCAD 2013 to AutoCAD 2015), I am planning to use that PC for gaming, AutoCAD 2013, 2014 or 2015, mostly 2D and and some simple 3D drawings. The problem is I am not sure if AutoCAD application mentioned will run smoothly in this setup. The price in my place is USD 445 including the 19.5" monitor and 2GB graphics memory, without operating system installed. The price is Ok for my budget but please somebody help me to decide, or should I go for Intel Core i3-6100 as my starting point?