Do I need another video card for 4K?

Roy from Pasadena, CA

Episode 1405 (1:29:18)

Video card

Roy has a high resolution 4K monitor, but his friends say if he adds a second video card, it could give him better resolution. Is that true? Leo says no. A newer one with more RAM could help, but if he's driving the monitor at its full resolution, then it's not going to get any better than that. A second video card would give him the ability to add more monitors, though.