I received a non-flashed 1080 Ti today. Inserted into slot 1 on a 2012 5,1, installed the latest beta driver (378.05.05.05f02) but the only card shown/found is the GT120 in slot 4. What did I miss? ...yes, I did connect a power supply. It is powered by a Be Quiet 850. The fan is blowing and the logo is lit up on the side. What rookie step have I missed? Update: the power supply ATX connector needed jumping.