Backward compatibility of PCIe 2.0



hey thanks buddy...so shall I proceed to buy it or you can suggest any better graphics card for me.
 


PSU is 300 watt.
processor core2duo 7500 series
ram 4gb ddr2

 


Shall I order it then?
will it have any issues with my PCIe 1.1 as the graphics card support PCIe 2.0?