Dell optiplex 980 amber flashing power button error code 1 3

So I have a Dell optiplex 980 and it had an intel i3 in it and have replaced it with an intel i5 and when I hit the power button it flashes ber and I get error code 1 3. I have 5ried moving around ram and the troubleshooting power button in the back and it lights up green. And when I tried the power button it flashes amber and I get error code 1 3. Is there any fixes I can try?