Motherboard sparked, system wont stay on

I recently upgraded my computer with a new PSU, ram, and video card. After I installed everything and turned the power on, a small spark came from my mobo followed by a small puff of smoke. The computer will turn on for about a second, all of the fans, begin spinning, including the video card and the processor fans; power is getting to the parts, but only for about a second or two. I swapped out my new power supply with my old power supply just to see if that might work, but that failed as well. I'm guessing my new PSU shorted out my motherboard. Now, do I send back the PSU and order a new motherboard? I've built a few computers over the years but I have never experienced a setback like this.

This is the PSU I bought: http://www.newegg.com/Product/Prod [...] 6817189009

I bought it and my case as a bundle, I thought it was a good deal since the reviews were decent and the price was right. I realized now it probably was a bad decision. Xclio isn't exactly an esteemed PSU supplier.

Yeah, I've never heard of that company. Your motherboard is almost certainly fried, so that will need to be replaced along with the PSU. Try a PSU from Antec, Corsair, or Seasonic.