samtara

I bought this card today and as the manual states i removed the old drivers and old card and put in the new one and installed the drivers...It all seemed like it was going well until it asked me to restart the computer (which i did) and the computer went into a reboot cycle.. I thejn reinstalled windows as i though a new copy would solve my probelsm but the same error occurs...My power supply is a 450w coolermaster so i doubt that is the problem...Also when i go into the bios the top has a very weird multicoloured pattern and the start up screen's colour is off. As well as that, once I had reinstalled windows and went to display properties it says display on..............its just blank as though doesn't recognize theres a graphics card in the computer (note: this was before i installed the drivers so maybe thats ok)
I would appreciate any help as this is getting very problematic..I am open to any recommendations.