I saw an article in the internet that there are different versions of Intel processors. https://www.laptopmag.com/articles/cpu-comparison Core i7 U Series and Core i7 HQ Series HQ - means more powerful U - power saving ( less productive ) So how to find out which version is used in current MBP? Also i need to understand is there any point to pay extra for upgrading the processor from 2.3GHz dual-core Intel Core i5 processor, Turbo Boost up to 3.6GHz to 2.5GHz dual-core Intel Core i7 processor, Turbo Boost up to 4.0GHz or from 3.1GHz dual-core Intel Core i5 processor, Turbo Boost up to 3.5GHz to 3.5GHz dual-core Intel Core i7 processor, Turbo Boost up to 4.0GHz I'm not planning to game hard... but i'm using FCPX from time to time. I'm not planning to buy new MBP within 5 years after purchase. All i need from my mac: - Buttery smooth 4K video playback - FCPX editing of 4K content And how do you think which option is the best value for money?