- Sep 3, 2001
GTX 780 has both 6 and 8 pin connectors. I have tried powering the GTX 780 with a new 650 watt power supply (dedicated 6 pin and 8 pin PCIe connectors), but every time I get the beeps and red light. I have tried with just the 650 watt PSU to power everything (motherboard, CPU, GPU, HHD). I even tried using the stock Z400 475 watt PSU to power the motherboard and CPU while using the 650 watt PSU to strickly power the GTX 780.
You are sure this GTX 780 works? You have tried it in another system?