Why buy a high-end processor?

No. High end GPUs are only meant for gaming. They help calculate equations to do with what will be displayed on screen, whereas the CPU is used for calculating basically everything that the GPU isn't. It's the brain of the computer. It's used everywhere. You'll get faster boot and loading times from a CPU, but if the CPU is a good one it can extend the life of your computer. They are also used for complex mathematical and physics calculations. The CPU can bottleneck everything in your computer if it is too slow. You get the idea.
 
There are a lot of applications that are more demanding than gaming . Most are professional tasks like rendering , CAD , and encoding .

We have reached the stage now where even a moderate processor is enough for gaming , or that the return from spending more on a processor for gaming gives a very poor increase in performance .
Gamers should concentrate on GPU's more than cpu's
 


http://hexus.net/tech/reviews/cpu/85370-intel-core-i5-6600k-14nm-skylake/?page=7

In some of the games the supposedly much lower performance APU is very close to intels latest i5
On page 8 the APU [ which is using a graphics card] is slightly ahead of the i5
 


Duh, When using an APU you will have lower fps because it is a gpu and cpu built together, therefore it is focusing on doing 2 different things.
 


Not necessarily. Those games benchmarked are with a dedicated GPU, so the GPU part of the APU is essentially disabled. I think Outlander was just pointing out that, depending on the games that are being played, Intel i5's are not as far ahead as one might assume.

Back on topic though, you have to find the middleground for your uses. High end CPUs/GPUs have a purpose - CPUs are generally for more professional tasks (rendering/edditing etc) vs GPUs for gaming.

For most people, a mid-range i5 is all that's necessary, but numerous gamers have an i7 or a high-end i5 "just because".

Budget tends to be the driving factor, but when some people take a step back, their rig is dramatically overpowered for their uses.
 


Those benches were done with a GTX 980 . The graphics cores of the APU were not being used .
The test shows that a moderate cpu + a great graphics card can perform as well as a powerful cpu and the same great graphics card
 


Exactly. There are CPU intensive games, GPU intensive games & some that are fair balance of all - there are not too many that require high end CPUs AND high end GPUs.

Again, it depends on your needs. Some people can find certain games enjoyable on 'low' settings & playable FPS.
Others feel they have to have Ultra settings and extremely high FPS. I guess it's more a blend of needs/wants/budget.