Here's how it happened. I tried to upgrade my graphics and put in a new gpu and therefore a new psu to power it. My new gpu was a gts 8800, while my old psu was about 300 watts and my new one was 450 watts.
I'm not sure what happened, but it seemed to work for a bit. Then when i plugged in my usb wireless adapter, smoke and shots of electricity spit out of this chip!!
After turning off the pc and replacing the psu with my old one - it worked and turned ON. But the only problem that seems to occur is when i plug in a usb drive into my front two ports. Literally, smoke comes out of the ports when you plug something in and the chipset starts to sparkle too.
Is it really that important that you plug in that usb in the front end? You're risking an oem board that's more expensive new or used. Get an extension and use the back ports for starters if the board still runs. What brand is your power supply? Does your 8800gt need a connector from the ps?