The video card I had fitted previously was an ATI/AMD device (an entry-model 5450, about as cheap as they come) so I changed cards with some trepidation expecting a lot of driver installations and hacking around at lower resolutions to get it to work since I was not just changing cards but manufacturers too.
In fact what happened was that It Just Worked. Windows 8 thought about it for a bit then brought my main screen up (a 2560x1440 Dell) in the same maximum resolution the old card had been configured for. It even remembered my second monitor's setup properly, a 1920x1200 display in portrait mode, no muss no fuss. Remembering the agony of configuring video systems in previous incarnations of Windows this swapover was almost... pleasant.