I want a graphics card for 81845GVM-RZ motherboard......please help me

Though the specs state this board has an AGP connector, I don't see one on the picture.
Judging by the three PCI slots on the picture, I'm going to say you have a few options of video card.
There are several options for decent and more-than-decent PCI video cards available:
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007709%20600007853&IsNodeId=1&name=PCI

Alternatively, if you don't want to open your PC up, You can purchase external USB video cards as well. They are a little bit costly but it's worth it:
http://www.build-gaming-computers.com/external-video-card.html

Hi,
Your motherboard is old one.
For adding the new graphics card you need to have the PCI Express x16 slot in motherboard
Your motherboard is not having this slot.
Buy a new motherboard.

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