Sorry these are not compatible ones. You need Sonnet Crescendo 7200 models.
And those are made with unobtainium.
Now that we know these work, why isn't anyone trying to reverse engineer them?
They are obviously the fastest PPC option for legacy systems.
And if new cards could be built, there are faster G3 processors that could be used.
The only problem I see is the limited number of WarpOS titles.
But its damned cool to see a legacy system cranking away like that!