I have built my very first gaming computer. My motherboard is asus z170-a, and gpu is zotac gtx 1070 amp extreme. This is the second gpu I have had, as I thought the first one was faulty. This new one is showing the exact same signs as the previous one. My PC shows no signal when the gpu is installed, no signal from either built in graphics or the gpu. As soon as I take the gpu out, and use the integrated graphics it boots just fine. The PC seems to boot past POST with the card installed but still shows no signal. I'm lost and could really do with some help. I have tried what I believe to be everything and I'm almost at the point of pulling my hair out!