I'm working on putting together a build on PC Partpicker (Canada), and I'm wondering what the difference is between the three aforementioned graphics cards is. Here is the link to my build: http://ca.pcpartpicker.com/user/triplechill/saved/mTdxF... From the information PC Partpickers gives me they are all the same. But I doubt they are. Possibly they are different sizes or compatibilities. Are they all compatible with my build?