When discussing system requirements/specifications, there's something that has confused me, the video card. Now hard drive, RAM, Processor, all of those have standard units of measurements, GB, GHz, etc. but with video cards I sometimes see it measured in allocated memory space, but more often than not I see a Directx number or NVidia. I don't know how these relate to eachother or what they mean numbers-wise. they're both brand names, aren't they, why are they used in a system specifications sheet? I'm fairly certain my laptop doesn't use either of those, so I'm a bit confused on the whole situation.