Mark Yapp

RUDE... Thanks for nothing.. 
A simple "i dont know" would suffice 

RUDE... Thanks for nothing.. 
A simple "i dont know" would suffice 

RUDE... Thanks for nothing.. 
A simple "i dont know" would suffice 

PLEASE focus on the Problem at hand.
#epicfail.
I totally forgot abt science. I was focus on the Solving the Problem.
 
I would gladly like to know if u have a solution for my problem
 
 

Either look up a GTX 1080 review, or pick a game and look up benchmarks for that specific game. Keeping in mind that a GPU review will tell you what performance was like at the time of release in popular games at the time of release and game benchmarks will tell you how a 1080 performs in that specific game at the time of the game's release (assuming a 1080 was around and relevant when that game was released -- e.g. you won't see a 680 being listed in most benchmarks of modern titles because it's not relevant anymore).

Yes, even lowly integrated graphics is technically capable of gaming at 4k if you go back far enough. But imo for a gpu to be called "powerful enough for 4k/8/etc...", it has to be able to run that resolution on most current games. 
Because not everyone games / runs modern games. Your 680 is more than enough to run chrome or a bluray at 4k. So if you want to run a 4k monitor, you can. You just don't have the processing power to play a demanding game at 4k. 

all he did was reserve memoy for it.
 
the way it normally works is the gpu can use a certain amount of memory, lets say 4GB. but it will almost never do that, only when neccesary. if you reserve memory for it, that means the system won't put stuff there. that's useful if you often have loads of stuff open and also need the memory for graphics.
 
but since you have a dedicated card that won't matter much, because that has it own 4GB of memory. and all heavy graphics applications will use that, and usually wont touch system memory.
 
the point is, Vram is phisical on your machine, it cannot be changed with software.

"Dedicated video memory", when it comes to your dGPU, is the same as the VRAM, ie. 4GB. It's the same thing, just a different way of saying it. And who cares why the person in the video did it? Probably just yet-another dummy who doesn't quite understand what they're doing; ignore him, you don't have to tweak any "dedicated video memory" settings on your laptop.