Give you an idea on performance difference on CPU's
http://cpu.userbenchmark.com/Compare/Intel-Core-i7-7700K-vs-Intel-Core-i7-7700HQ/3647vsm211019Intel CPU's with an U, HQ and HK is laptop processors, and CPU's without something after the numbers and K models are for desktops.
For GPU to compared
http://www.anandtech.com/bench/GPU16/1489AMD currently don't really have much counterparts for higher end GPUs from nvidia like 1070, 1080 and 1080ti. Tho their Vega series is on the way.
a GTX 1060 is close to performance to an AMD rx480/rx580.
DDR4 ram will be used for intel cpu's 6xxx and 7xxx (skylake and kaby lake). While DDR3 is for older models like haswell series and older.
In laptops with intel cpu's ending with an U there will be used DDR3L (low voltage version of DDR3)
AMD been doing quite good on the newely released CPU serie Ryzen. They are great value and perfect for workstation PC's.
But if you gave us an budget and a summery of what programs/games you will be using on system we will be able to give you an good idea on what to get.
RAM manufacturer doesn't really matter, but i do recommend G.Skill, Corsair, Kingston and Crucial. And for regular 2.5" SSD I recommend Crucial Mx300 and Samsung 850 evo. There are some cheaper ones out there if the budget is to low.
This post was edited by ZwiX on Jun 1 2017 02:21pm