type of graphics card unknown

[christy]

how can I display the type of my video card(GTX480)and the vr size in macpro graphics/displays contents.Unknown nVidia card:

 

Chipset Model: Unknown nVidia card

Type: GPU

Bus: PCIe

Slot: Slot-1

PCIe Lane Width: x16

VRAM (Total): 0 MB

Vendor: NVIDIA (0x10de)

Device ID: 0x06c0

Revision ID: 0x00a3

ROM Revision: Silent Natit x86_64 v1.0.2

Displays:

Display Connector:

Status: No Display Connected

SyncMaster:

Resolution: 1920 x 1200 @ 60 Hz

Pixel Depth: 32-Bit Color (ARGB8888)

Main Display: Yes

Mirror: Off

Online: Yes

Rotation: Supported

 

please need help.thank you