Well now... hmmm.
The brick installs with no problems and everything seems to work but when you hit the test glide button in the control panel the test program seems to hang. I don't expect to see anything of course (no I/O connector) but I should be able to hit "esc" and get the driver control panel back. For the gamma test that does work.. with a slight delay.
Possible causes-
1) The drivers indicate service pack 4 are required, I installed service pack 6a (the latest) maybe an issue, maybe not.
2) Motherboard isn't correct- The drivers indicate an intel BX motherboard should be fine but LogicalMadness posted he could not get his working in anything but a intel GX.
3) Power supply doesn't have enough balls- The best I had handy was a very high quaility 300 watt ATX unit from PC power and cooling I used years ago with my 1.0 ghz Athlon system. A 400 watt was mentioned as being a good idea.
I may have to 'jack the 550 watt unit from my 2.8 ghz machine for further testing
So.. there is no errors when the control panel comes up and the cards have been individually tested ok already so that is a good sign.. I think the next course of action is to find an I/O connector and get a burly power supply and try again. I could try reloading NT4 and just install SP4 but I don't think SP6a is the issue but won't write it off either!
G.