Yeah thats, where I measured on the fuse.......and it wasn't microvolts...it was VDC, (I know when my multi does micros its obvious).....
  I stopped and got a corsair CX 600, Inspected all the boards and ensured all the screws were in properly, plugged the cube back in and every thing is working good!!! there is no heat being generated on the 2 PCIE connectors or wires, and even the PSU itself isn't pushing a large amount of heat out....so everything points to a bad PSU....(must have been put together on a friday at 4:30 lol)..
  Oh I replaced the fuse already (the previous one melted)....and I only have ever used Bussmann fuses...mostly because they are the most common (well at least in my area and places I go)....

Moral of the Story: Get a good powersupply....Cheap ones will only cause you problems in the end and cost you more money...