So I have a gtx 1080 and the TR2 600W PSU from Thermaltake. I noticed the 1080 has two 8 pin pcie slots for the psu. However, my psu only has one 6+2 plug and a 6 pin plug. So when I power up my system it tells me to plug in the graphics card to the power supply and won’t boot. What am I supposed to do?