I have: PSU - OCZ Fatal1ty 750 W MB - ASUS Maximus IX Formula CPU - I7 7700k VC - ASUS ROG Strix GeForce GTX 1080 8G Gaming The test before mounting the video card is ok: After installing the video card, the system does not start. The source does not start either. If I disconnect the video card's power cables from the source the system starts, the video card lights are on, but the fans do not work. I did not connect it to tv to see if it works. This is the source in question: Thank for your time and help!
Problem solved. It was a common human error. A reverse-mounted cable.So look carefully not only at the type of cable you are using, but also at the shape of the pins of the connectors that will tell you the end that connects to the source and the one that connects to the video card. Thank you Luke Cool for this article! http://www.overclock.net/a/gpu-and-cpu-power-connections