I was reading somewhere...... http://www.theinquirer.net/
I think it was
were albatron was only clocking there 6800GS "agp" to 350
but other companies were going to 400 core with there's.
The GS "AGP" is the NV40 core and the "PCI-E" is the NV41.
So the up side might be that u can open up more pipes on the AGP card.