I installed a new power supply (took me 3 hours) Then I put in the graphics card,and it fitted. So I tried starting it up everything semed okay,I plugged in the monitor and it says no signal...There are two hdmi slots am I supposed to stick it in the graphics card one or the one that's already there? Also my acer computer does not have an option to disable onboard graphics card and to change the primary adapter to PCI-E the only thing it has is Power on by PCIE Devices..Can any of you help me please 🙁?