So, I built this computer month's ago for a client who wanted a fast machine for video editing, photo work and just general computing. She also didn't want it to completely break the bank. Since delivery, it's been nothing but trouble (kernel power failures, WMI errors etc.)
Here's the thing. The computer stopped having kernel power failures and blue screens after removing the graphics card. The graphics card is flawless in any other system. So It was determined by a third party that the graphics card is drawing too much power for the PSU to keep up.
I performed PSU wattage calculations before the build, and again now. Even with the card, worst case scenario, the machine would pull 350 watts. Thats with everything pegged at 100%. There is still a 70 watt headroom there.