1) Is the display cord plugged into the 570 instead of the onboard?Correct.When the power from the power supply is plugged into the 570 I get nothing on the screen when I boot, even from the on board graphics. When I unplug the power to the 570 it boots fine.
2) Is the PCI-E connector plugged all the way into the PSU and all the way into the 570? Force that bitch hard.
3) You certain you are using the PCI-E cable?