Thanks for the reply. i followed the steps as mentioned in ur URL..
--computer works fine with the onboard VGA card.. after installing the new graphics card i pluged the monitor cable into the new graphics card and swithon the system.... im not able to see anything in the monitor ( on fly i pluged the monitor cable to onboard VGA i can able to see the OS)
if possible let me know ASUS EAH5450 card is comp. with PCIe X16 slot