I'm not too computer savvy, so bare with me! What's the maximum fps which coincides with screen refresh rate?
Out of those cards, which would supply the best graphics? Are the graphics determined by power, that is?
there are two things that determine what you see generally
Screen Refresh rate: How many times the screen refreshes
FPS: or frames per second, which is how many times an image is created per second
For instance, you can have unlimited fps, but the screen refresh rate can only display a set amount of frames as that's how many times it refreshes the screen, refresh rate is dependent on monitor. it ranges from 60, and intervals of 15 usually(60, 75, 120 etc) effectively capping the frames you can display, so fps over 150 for example are moot. to a basic human eye, 60 fps is the level where most of the details can be seen.