Does the wattage thing on PCPP show the load wattage or idle wattage?
Guesstimate full load wattage.
Guesstimate being the key word...
dont get a psu rated at what it tells you... get one a little bigger at least to be sure your ok and at good efficiency durring operation.
this page will give you an idea based on the GPU
I think it's supposed to be load, but it doesn't seem to do a fantastic job at being accurate.