What parts should I upgrade?

What do you want to use it for, gaming? If you do, then a dedicated graphics card is the first thing you need. With that CPU (which is actually an APU), probably a GTX 1050Ti would be a good match. However, this is assuming your computer is in a form factor which can take a dedicated graphics card and that it can supply enough power for it. What is the model number of that Lenovo?
 

Yogpod

Prominent
Jul 15, 2017
6
0
510


I have A GTX 950 that im gonna use, I also have a 500w white EVGA PSU
 

Yogpod

Prominent
Jul 15, 2017
6
0
510


It's a shitty prebuilt Lenovo Ideacentre 510a, Im planning on getting this case though.
https://www.newegg.com/Product/Product.aspx?Item=N82E16811853003&ignorebbr=1
 


Sounds like a plan. Should be all you need to get you playing the latest games.