Intel Motherboards : X79 Extreme9 dosent start

For a start we need to determine what caused the problem, the 2 new components or something actually broke. The easiest way to do this is to put the system back to it's original state (when it last posted).

So, reinstall the old GPU and power supply and make sure everything is connected as it was. If you still get the 19 code then we need to determine what else could have caused it.