So I have a question about a laptop and the PCI-E slots.

So I bought a Lenovo Yoga 720-151 Intel Core 7 about a year and a half ago and I only use if for gaming. It does great. Most of the time. But harder when running 40 plus man raids and such. It runs a Nvidia GeForce GTX 1050 which i am also trying to find out if can be upgraded. But I was looking at my motherboard through Speccy and I have 4 PCI-E x1 slots and 1 is being used. I also have a PCI-E x4 slot which is not being used. Ive been trying to read up and it says that it can increase my speed (i’m hoping they were right) but I need to know if that’s true and even worth my time. Would upgrading or adding cards help? I do not plan of getting rid of the laptop anytime soon as it still runs top notch. I could probably do the upgrade myself because I have done some internal workings on desktops. Can anyone help me out? How the about the graphics card as well? I could always go back to my desktop because I bought a competely upgradeable one but I really prefer my laptop due to freedom. Thanks again. Have a great night.