Played Quake 2 on my A4000 with csppc+mediator+voodoo 3 3000 PCI (16MB), ran mighty fine in 1024*768*16 think it reached about 25-30 fps with peaks till 50 to 60 fps
I also played it on my A1200 with blizzard ppc (040/25 with 240Mhz ppc,128 MB+bvision) and the optimal res is 512*384*16
for an A1200 with this config.
but don't go multiplayer/online it will get pretty slow on ya if there are a lot of players in a level (more then 10)
640*480*16 was to hard on the Old permedia 2 with Q2.
What i found as a nice speedup is that you can assign some mem from your voodoo as system memory with the mediator.
Tested a Voodoo 4 4500 PCI (32MB) for a friend in my Amiga
i assigned 16 MB of gfx mem as system memory and things did
sped up.
maybe this causes less traffic over de PCI resulting in less problems with 8MB address space issue i cannot tell for
sure.
Q1 on the 060/50 CSPPC ran really amazing with the voodoo3, i could even play it in 1024*768*16, the sad thing was though there was/is a bug in 68k Q1 when walking into an area for the first time in a level it would run bog slow :-(
