After putting a gtx 660 and a corsair tx 650, I decided it was time to replace the processor (an i3-2120) with an I5 3570K. I made sure that they used the same sockets and went ahead and replaced it. When I booted up my PC it beeped four times and didn't respond. I then put the i3 back and now its fine. I'm almost positive that I installed the i5 correctly, so does anybody have any ideas of what went wrong?