That depends on what you are doing. If it's just general work or viewing YouTube videos any GC with 3 or 4 MB memory will work fine. If you are into gaming do you want 75+ fps or 4k resolution? Then you're going to need a Nvidia 1070 with 8 GB memory minimum. There are lots of YouTube videos so I would watch them before jumping into a $$$$ card. One thing to note, GCs are very expensive due to cryptomining.