Code:
NVIDIA GPU product  	 Device PCI ID 	VDPAU features
GeForce 7050 PV / nForce 630a 	0x053A 	-
GeForce 7050 PV / nForce 630a 	0x053B 	-
Following the link on that page to the codes for "VDPAU features" lists the explanations for the A, B and C feature sets. I don't see any entry corresponding to the hyphen. Moreover there are lots of cards above this one in the list that I know for sure do not support VDPAU like the 6xxx series that also have a hyphen in the same position.

What do you see that I don't?