Re: AMD64, Tyan K8W, Geforce 5700 = black screen
I'd say your FX5700 is faulty. In my config, I've been able to use a GF4200 (AGP-4x), a FX5700(AGP4x-8x) and a 6800(AGP8x) all with the same configuration file.
Do you have access to any other FX5700 (non Ultra) ? If so, you can determine if your problem resides on the hardware or the drivers.