Computer won't post, I get nothing, no signal, no beeps, nothing. I tried everything, checked cpu, cables, ram, tried with 1 stick, 2 sticks, 3 sticks, tried different psu, cleared cmos, used Vga cable, pulled monitors power cable out and nothing worked. Computer always worked without problems, only difference this time was that I used different(New) graphic card. So I put back old gpu with which computer always worked fine with but computer didn't boot with that card either. All I can try is to use other Pcie slot, but I don't know why first one wouldn't work, if that won't work then I don't know what else to do. Do you have any ideas?