Found & read it, DC!
Will have to give that method a shot next clean install of Mint.
BTW, those dual graphic notebooks are a pain in the rear, I installed bumblebee from the Package Manager, as Nick advised me some time ago. It's not a perfect solution & not everyone will benefit, yet it does assist many with an Optimus replacement. Would be great for notebook owners with dual cards to also be able to disable onboard graphics, just as desktop PC users can, for whatever reason, the OEM's just doesn't want to do it. Battery life may be one reason, yet that's a cop out, GPU's of today uses less energy than ever when performing daily tasks. Gaming is different & uses a considerable amount of power, though chances are, notebook users will want to be on AC power for the performance benefit alone & to place it on a powered cooler, which draws more power.
The bottom line is that notebook users are penalized for their purchasing choice.
And another reason why the PC will never be dead. Our choices are tied only to how much cash we want to spend. BTW, the GTX 980 is a great card, for my needs, the 960 was enough, yet if a hard core gamer like the OP obviously is, than a 980 or higher it would be, along with the needed PSU to keep things running good. Too much power won't harm anything, the system will only draw what it needs, too little is what damages components & one can only hope that the PSU goes w/out taking other components with it.
Hopefully the OP can find some type of Linux OS to use as a gaming platform.