i have been looking at graphics cards and i noticed that they have two ports. but my case only has one hole for ports. (FIX) im not talking about where the graphics card plugs into the motherboard
If by "hole for ports" you mean expansion slots in the back where video outputs are, then yes, many GPUs require 2 slots. However some medium-range cards are available in single slot form. What case do you have that only has one slot?