Does anyone know anything about video cards in Windows 3.1?

I have a bunch of old Windows 3.1 games which don't work well or at all under later versions of Windows. I have my old copy of Windows 3.11 (Windows for Workgroups) running on DOS 6 on my old Pentium III machine. Everything works very well except the video adapter. I have a Diamond Viper v330 which works without any issues until its own drivers are installed, (instead of the VGA driver which comes with Windows). After its drivers are installed the computer randomly crashes and emm386.exe reports error #6 (illegal operation.) Any ideas of how to fix this? Are there any good PCI or AGP video cards which can be used under Windows 3.1?