Just as a side note (but seemingly unrelated to this exact issue)- 2 things...
1) anything that tends to wipe open firmware settings, from a dying PRAM battery to rebooting under a sever hardware change on occasion will cause the sonnet 800/1ghz g4 cards to boot in an unstable mode (aka without that patch the installer injects into the system settings - the name of what's patched is failing me at the moment, but it helps the pci macs not totally spaz out on the g4 cards) to fix this if you're stuck in an endless crash cycle that only extensions disabled lets you bypass is reinstallation of the drivers (reinjects the patch the the system hardware for the next boot), or tricking the system into loading the sonnet extension ASAP at boot time. I prefer to keep a copy of the installer handy on my system for just these circumstances
2) sonnet 800/1ghz + kansas = major instability... you'll notice that on all official listings for system compatibility of these cards, the 300/350mhz 8600/9600 is omitted.. apparently back in the day, sonnet never finalized a patch to fix the problems that occur in these systems... after going through 3 brand new boards, in my 3 perfectly working 9600/350's, and tons of time with sonnet on the phone.. the conclusion is that no one from the original engineering team for these cards is still around and yeah.. there's a good chance it might be buggy on the kansas boards... I found that all 3 boards were rock solid on my 7300's and 7500's that I had sitting around (but of course, being short 3 pci slots for my planned setup was not fun.) finding a non-kansas 9600 board was troubling, and alas- the 9500 you sent works PERFECT... had to run the inital patch, but the system i setup and had been running (although missing half my hardware) on the 7500, worked right out of the box!
so basically - my word of caution is.. sonnet 800/1ghz are amazing cards, BUT keep the installer handy for times when a pram reset is needed, and stick with the more common "crummy" pci powermac boards or you'll have a major headache...
1) anything that tends to wipe open firmware settings, from a dying PRAM battery to rebooting under a sever hardware change on occasion will cause the sonnet 800/1ghz g4 cards to boot in an unstable mode (aka without that patch the installer injects into the system settings - the name of what's patched is failing me at the moment, but it helps the pci macs not totally spaz out on the g4 cards) to fix this if you're stuck in an endless crash cycle that only extensions disabled lets you bypass is reinstallation of the drivers (reinjects the patch the the system hardware for the next boot), or tricking the system into loading the sonnet extension ASAP at boot time. I prefer to keep a copy of the installer handy on my system for just these circumstances
2) sonnet 800/1ghz + kansas = major instability... you'll notice that on all official listings for system compatibility of these cards, the 300/350mhz 8600/9600 is omitted.. apparently back in the day, sonnet never finalized a patch to fix the problems that occur in these systems... after going through 3 brand new boards, in my 3 perfectly working 9600/350's, and tons of time with sonnet on the phone.. the conclusion is that no one from the original engineering team for these cards is still around and yeah.. there's a good chance it might be buggy on the kansas boards... I found that all 3 boards were rock solid on my 7300's and 7500's that I had sitting around (but of course, being short 3 pci slots for my planned setup was not fun.) finding a non-kansas 9600 board was troubling, and alas- the 9500 you sent works PERFECT... had to run the inital patch, but the system i setup and had been running (although missing half my hardware) on the 7500, worked right out of the box!
so basically - my word of caution is.. sonnet 800/1ghz are amazing cards, BUT keep the installer handy for times when a pram reset is needed, and stick with the more common "crummy" pci powermac boards or you'll have a major headache...