Ok so for a while now I have been playing with a i7 8700k with a rog strix z270h gaming motherboard with a Radeon 5700 xt gpu but have been getting very poor frames I think this is because the gpu is in the bottom slot but every time I try to put the gpu in the top slot the gpu and pc fire up as normal but then I get no signal on the monitor when I plug out and in the hdmi/ display port cables the monitor lights up meaning it’s getting some sort of input? Nothing is broken that I know of unless the top slot is broken but then why is the gpu working ? One thing that happened is when I tried it in the top slot first the pc started then instantly stopped then started again. Do I need a new mobo?? Thanks for any help in advance