asus rog strix z370-e gaming wont boot with graphics card installed

g_nips

Prominent
Apr 19, 2018
12
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510
The computer wont boot when the graphics card is installed. the first problem occurred when powering on an the boot screen said a CPU fan isn't connected. i reconnected everything and then reinstalled windows. the problem was fixed within about 2 hours of using the PC again it turned off. i was able to narrow it down to either GPU,PSU or motherboard. i've tried a different graphics card in the board and it wouldn't boot. the computer works fine without the graphics card. i check the power supply 3.3V, 5V and 12V in the bios they're within the tolerance range. I'll have someone putting my graphics card into their rig over the next few days but i don't believe the graphics card is broken as the other card i tried didn't work either. any help would be appreciated thanks very much :)