A:AnswerIt is 4GB. That link you provided is for desktop GPUs not their notebook ones which often have different memory configurations.
https://www.nvidia.com/en-us/geforce/products/10series/laptops/#specs
A:AnswerI would seriously like to know the answer to this question as well, it's why I'm on the FAQ page, and will determine whether I buy this product or not.
A:Answerit really depends on what games you are running and at what resolution to be honest. i have the 1050 model and it runs every game i play just fine but then again im used to a desktop with a 750ti