I bought a used gpu (EVGA 750Ti) that was untested online for cheap and put it in my second system to test. At first the HDMI and Dport ports didn't return a post however the DVI posted and told me there was no drives detected. On inspection they are all plugged in. It then said F1 to run setup and F2 to load defaults and continue and neither button would work when I pressed it even when I moved the USB port the keyboard was plugged into. I tried the old Gpu to see if that was the problem (which I know was working before) and it also returned exactly the same issue. I didn't think GPU's could corrupt drives so is it possible I've fried my motherboard?