Extract from the Microsoft Hardware Compatibility List for Windows 2000, dated January 16, 2000. Please note that later HCLs don't have a multi-monitor section anymore, so this is still somewhat useful. For more up-to-date information, see the Compatibility Database.

Display Adapter (Multimon)
---------------------------------------------------------------------------
3DFx Voodoo Banshee (AGP)
3DFx Voodoo3 2000 AGP (AGP)
3DFx Voodoo3 2000 PCI (PCI)
3DFx Voodoo3 3000 (AGP)
3DFx Voodoo3 3500 TV AGP (AGP)
3DFx Voodoo3 Compatabale Graphics Adapter (AGP)
3DLabs Inc. 3DLabs Permedia2 Compatable Graphics Adapter (PCI)
Accel Graphics AccelStar II (PCI)
Accel Graphics AccelStar II AGP (AGP)
Appian Graphics Jeronimo Pro (PCI)
Asus 3DExplorer 3000 (AGP)
Cardex Cardexpert 128ZX (AGP)
Creative Labs Creative Graphics 3D Blaster Banshee (PCI)
Creative Labs 3D Blaster TNT2 Ultra (AGP)
Creative Labs Graphics Blaster Extreme (PCI)
Diamond Multimedia Fire GL1000 Pro (PCI)
Diamond Multimedia Fire GL1000 Pro AGP (AGP)
Diamond Multimedia Monster Fusion Z100 AGP (AGP)
Diamond Multimedia Monster Fusion Z100 PCI (PCI)
Diamond Multimedia Viper V330 (AGP)
Diamond Multimedia Viper V350 (AGP)
Diamond Multimedia Viper V550 AGP (AGP)
Diamond Multimedia Viper V550 PCI (PCI)
Diamond Multimedia Viper V770 (AGP)
Diamond Multimedia Viper V770U (AGP)
Digital Comet (PCI)
Elsa Victory II (AGP)
Elsa Erazor II AGP (PCI)
Elsa Erazor II PCI (AGP)
Elsa Erazor III (AGP)
Elsa GLoria Synergy (AGP)
Elsa Synergy II (AGP)
Elsa Victory Erazor (AGP)
Elsa WINNER 2000 (AGP)
EON Tronics Lilith Banshee AGP (AGP)
EON Tronics Lilith Banshee PCI (PCI)
EON Tronics Picasso P-2 (PCI)
Gainward Dragon 4000 (AGP)
Guillemot MaxiGamer Phoenix (AGP)
Hercules Dynamite 3D/GL (AGP)
I/O Magic MagicVideo 3D EP (PCI)
I/O Magic MagicVideo Banshee 3D (PCI)
I/O Magic MagicVideo TNT2 (AGP)
Joytech Apollo 3D (AGP)
Leadtek Winfast 3D L2300 (PCI)
Leadtek Winfast 3D L2300 AGP (AGP)
Leadtek WinFast 3D S320 II (AGP)
Leadtek WinFast 3D S325 (AGP)
Leadtek WinFast VR300 (AGP)
Matrox Marvel G200 AGP (AGP)
Matrox Marvel G200 PCI (PCI)
Matrox MGA-G100 AGP (AGP)
Matrox MGA-G200 AGP (AGP)
Matrox Millennium G200 AGP (AGP)
Matrox Millennium G200 SD AGP (AGP)
Matrox Millennium G200 SD PCI (PCI)
Matrox Millennium G200 SG AGP (AGP)
Matrox Millennium G200 SG LE AGP (AGP)
Matrox Millennium G250 AGP (AGP)
Matrox Millennium G250 LE AGP (AGP)
Matrox Millennium II AGP (AGP)
Matrox Millennium II PCI (PCI)
Matrox Millennium PCI (PCI)
Matrox Mystique G200 AGP (AGP)
Matrox Mystique G200 SD AGP (AGP)
Matrox Mystique G200 Video AGP (AGP)
Matrox Mystique PCI (PCI)
Matrox Productiva G100 AGP (AGP)
Matrox Productiva G100 Multi-Monitor (PCI)
MaxiGamer Xentor 32 TNT2 Ultra (AGP)
Number Nine Imagine 128 Series 1 (PCI)
Number Nine Imagine 128 Series 2 (PCI)
Number Nine Imagine 128 Series 2e (PCI)
Number Nine Revolution 3D (AGP)
Number Nine Revolution 3D (PCI)
Number Nine Revolution 4 (AGP)
Number Nine Revolution 4 (PCI)
nVidia Riva 128 Compatable Graphics Adapter (AGP)
nVidia Riva 128ZX Compatable Graphics Adapter (AGP)
nVidia Riva TNT (AGP)
nVidia Riva TNT2 (AGP)
nVidia Riva TNT2 M64 (AGP)
nVidia Riva TNT2 Ultra (AGP)
nVidia Vanta (AGP)
PixelView Riva TNT2 (AGP)
PixelView Riva TNT2 Ultra (AGP)
Quantum3D Raven (AGP)
SiS 300 Compatable Graphics Adapter (AGP)
STB Systems Inc. MVP Pro 128 (AGP)
STB Systems Inc. Sapphire (AGP)
STB Systems Inc. STB Glyder Max-2 (PCI)
STB Systems Inc. STB Glyder Max-2 AGP (AGP)
STB Systems Inc. STB Velocity 128 (AGP)
STB Systems Inc. Velocity 100 AGP (AGP)
STB Systems Inc. Velocity 4400 AGP (AGP)
STB Systems Inc. Velocity 4400 PCI (PCI)
VeiwTop Viewtop 3D Mars 2 (PCI)
VeiwTop Viewtop 3D Mars 2 AGP (AGP)
Yuan 3DXtreme2 (AGP)