I run mine at about 85% capacity, and I switched to a 550 watt power supply after my 400 died. Much better.
You could always run it in non-graphical and see waht happens.
Not sure what you're saying about nongraphical.
Am not using the GUI on F@H.
But appreciate the suggestion.
I have a very over necessary power supply. Very hefty. I ordered the computer built that way in Taipei.