Zac67 wrote:
Probably a Voodoo 5/5500 - if you can find one. I remember seeing a 5500 on eBay about a year ago...
Wikipedia: Voodoo 5
PS: there's one on German eBay right now: 8784289418
I don't know about G-Rex driver, but Mediator driver at least doesn't take advantage of the 2nd GPU, as has been mentioned.
The 3D drivers were written for Voodoo 3 - it just happens that the Voodoo 4 and 5 are similar enough to work, but they're not 'officially supported' by Warp 3D, and in the test I did (in a Mediator 4000 - maybe G-Rex will be different), a Voodoo 5 5500 was slower than a Voodoo 3, so I switched back.
I think the best card to use is a Voodoo 3 3000 SGRAM. And it can be overclocked 10% without additional cooling, more with cooling (done via tooltypes in P96, I don't know about in CGX).