Just got a new sound card to add to my build. To make room for it, I moved my 2-slot GPU to the second PCI-E 3.0 slot to uncover two more PCI slots, since I already have a wireless card in the PCI slot above the first PCI-E 3.0 slot. After rearranging the cards and plugging the machine back in to power, the machine will not power on. Curiously enough, the usb mouse I have plugged in the computer has it's LED's lit, but this is the only sign I have that the computer is even getting power, since the power/reset buttons are otherwise unresponsive. Any ideas?