Multiply gpu setup on am3+

[Max koke]

I currently have a quad display setup, and my computer is currently running a fx 6300, a gtx 970, 8gbs of ddr3 ram, a msi 970a-g43 motherboard and a corsair 750 watt psu. I have a gtx 480 laying off to the side and I want to put it in the machine so I can use it for more display out puts, but when I put the gtx 480 into one of the pci e slots and boot the computer up, windows recognizes the gtx 480 is there but I get error (43 the device is not working properly) this is caused by no drivers for the hardware but I put the driver's for the gtx 480 on my computer multiple times and it still wouldn't let me use the gtx 480 and I have it plugged into the correct pci e slot, so I have no clue why it won't work.. 

 

Can anyone help me out and give me some ideas of what to do.