I use a Voodoo 4 4500 PCI in my Mediator on the classic. The Mediator P96 driver is for the Voodoo 3 but works. There are bugs in Big Endian screen modes that mess up the colors but no crashes and only 16 of the 32 MB of memory is added to system memory although all 32 Mb of gfx memory is available for P96 and Warp3D. The Voodoo 4+ supports more 2D screen modes if they would work in the driver. The speed is faster in some cases and slower in others than the Voodoo 3. Only 16 bit modes are supported by Warp3D although the Voodoo 4+ is capable of 32 bit and 15 bit 3D. Most of the advanced features of the Voodoo 4+ are not supported in Warp3D for the classic. The Voodoo 4+ may be better supported in AmigaOS 4.x but the Radeon makes more sense there. There is no Radeon Warp3D driver for the classic.