I have a Radeon 7000 in my Mediator, now replaced by a Sapphire 9250 PCI Radeon.
The Radeon 7000 worked good on the VGA port connected to a lcd fullhd monitor. The os was OS4.1 FE, the card worked out of the box. Only problem where some glitches when using DVI, but as stated VGA was ok.
Re: Ati 7000 PCI Mediator Posted on 20-Sep-2017 20:04:18
The Radeon 9000 Pro is faster than the 9250 but it's pointless to splash out extra for one since even my BPPC was still the bottleneck when I had a Mediator and Voodoo 3. PCI versions of the 9250 are pretty common on Ebay and a also very cheap.
If you're really lucky (i.e. can find one at a reasonable price) then get a Voodoo3 since there is a 68k Warp3D driver for that which might be useful if you get a a Vampire for the A1200 some day.