GPU Upgrade

I have an MSI GL63 8RD laptop. i7. 1050ti. I was wanting to know if I could upgrade this to a 1070ti, or if I would need another part upgraded before I do this. Thanks for the help, I don't know much about PC parts.

I recently bought a gaming laptop, asus rog g551jm with an nvidia geforce gtx 860m 2gb graphics card, i'm very happy with the overall gaming performance of my computer, but i was wondering if it is possible to upgrade the video card for a gtx 860m 4gb or a gtx 880m or a 4gb video card? I want...