Suggest a Graphics Card for my Intel DG31PR

Hi, i am new here. i need a graphics card for my Intel motherboard within a range of 4000 Rs;
Configuration:
Intel DG31pr Motherboard
2gb DDR2 ram
Intel Core2Duo Processor E7200, 2.53 GHz
Windows 7 Installed
Screen Resolution: 1440x900
I need it for gaming....
Please suggest a good Card for me....
I prefer 1GB memory. Please help me Guys.....