just today got my new parts and built my pc, i got it all set up and its started nicely installed win8.1 (regret this choice should have got 7) and my pc isn't recognizing my gpu, when i try installing the drivers on the cd wich came with it (r9 290) i get an error message saying unpack failure, im worried i plugged the gpu in the wrong slot, on my mobo i have a pci express and a sli, my gpu is in the pci express please help