Graphics card problem

I tried to install a Radeon 5450 graphics card in a Dell Optiplex 380.
When I booted the computer I got bleeps then nothing blank monitor.I know this card is suitable can't figure out whats going on.Took out the new graphics rebooted and bleeps again and a blank monitor.Can any one help please.
 
Update>>>>>>>>>> I am an ***** the graphics card does not fit into the slots and I forced it in. ............need my glasses changing! now my pc will bleep fan works but I am getting a blank screen
 
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