with latest 2.6.0 final it works AGP 8x!!
I was very happy to see that after installing the latest 2.6.0 kernel the agpgart works!!!!
I compiled inkernel agpgart with the amd64-gart.
during bootup it DID NOT scan the bus. hmm
I set NvAgp to "3" in XF86
modprobe the new rebuilt nvidia.ko and guess what showed up in dmesg?
1: nvidia: loading NVIDIA Linux x86_64 nvidia.o Kernel Module 1.0-4499 Wed Sep 17 17:03:05 PDT 2003
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
and in agp/status
AGP Rate: 8x
Fast Writes: Disabled
my glxgears /* default popup size */ went to 2650 fps
All bow to the new kernel!
thanks everyone who read/help/commented or had the same problem as me.