1. Both Windows and nVidia expose 1024x768, 1152x864, 1280x768/800/960/1024, 1360x768, 1366x768, 1600x900/1024/1200, 1680x1050, 1920x1080/1200/1440, 2560x1440
2. In addition to those, games expose 800x600. I don't think I'll see the need to use a lower resolution in games, because G-Sync does...