[strike]Based on the
specs for your power supply, it appears it does not have a PCI-E power cable (hence the warning from PC Part Picker). You'll need to go with a different power supply. The CMX from Corsair, that
madmatt30 suggests seems to be a reliable unit.[/strike]
-Wolf sends
Edit: Apologies. On second glance, the specs page shows that the power supply has a modular PCI-E power cable but not a fixed PCI-E power cable.
My mistake.