Video drivers are software programs that enable the communication between the video card and the operating system. Video drivers also provide the functionality and settings for adjusting the resolution, color depth, refresh rate, and other display properties. If the video drivers are outdated, corrupted, or incompatible with the new video card, the resolution on the display may be low or incorrect. Installing new video drivers that match the model and specifications of the new video card can fix this problem. Reference: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 3, Section 3.3, Page 124.