I have a 12 year old HP desktop that is barely getting by. It has an old AMD processor, Windows XP, and 1 Gb of ram. All I really do is surf the web, watch youtube videos, maybe use a tax program, etc. Would a Intel i3-6100 be plenty, or do I really need like an i5-6400. Will probably get 8Gb of ram. Thanks. By the way, I am assuming I will see quite an increase in performance over my current machine ????????