I have finally bought a GPU. It's nothing special, but it was cheap and it's still better than the rest of my hardware. The model is Geforce GT 1030 Silent Low Profile 2GB GDDR5 by Gigabyte. My motherboard is Gigabyte H61M-S2PV. My PSU provides 400 W. The OS is Windows 7 32 bit and it has UEFI. When I connect everything according to the instructions, my PC won't start. I can't start BIOS/UEFI either. The screen shows the American Megatrends logo (motherboard, I guess?) and the computer keeps beeping. Eventually the screen says "no signal" and turns off. Somehow, none of this happens when I try the GPU on Pepe's computer and it starts normally. When I remove the GPU, my PC runs normally. What's wrong?