Big Download: "FPS (as in frames per second, not first-person shooter) is a quick-and-dirty way of judging whether or not your rig has the cojones to support your chosen display resolution and eye candy predilections. Simply put, can your system churn out the graphics fast enough to keep up with the demands of the game(s) you're running?
If the answer is "yes," do you have any headroom to up the graphical ante? If the answer is "no," what are your options? Okay, options other than spending lots of money; spending money is always an option, but we do occasionally want to be practical around here."