Mouse and Keyboard Won't Work After Adding Duplicate Graphics Card

[Panzerknacker15]

Hello,
My system has been running well. I have been running with an EVGA GeForce GTX560Ti. Rather than get a new graphics card, I got another GTX560Ti on eBay to do an SLI Bridge with.

After adding the card to my extra PCIe slot, I rebooted. Once the login screen (Windows 7) loads, my mouse and keyboard won't work. It won't work in Safe Mode either but it does work on the BIOS screen. These are USB.

With only my original graphics card, my computer runs normal. With only the new card or both cards, the mouse and keyboard won't work. My power supply is 1000W, so it is plenty to cover all power needs of the system.

I'm not sure if its the drivers on the new card, but I'm not sure how I could update them if I can't log in. I've tried resetting the BIOS, but that did not fix it. I'm not sure what else to try. Thanks for your help.

UPDATE: I borrowed a PS/2 mouse from work today. That does work while running this card. Will try to update the card drivers with the mouse.

 

[Panzerknacker15]

Update: I borrowed a PS/2 mouse from work today. That does work while running this card. Will try to update the card drivers with the mouse.

 

[Panzerknacker15]

I was able to load drivers for the new card, so both cards now are running the same drivers. Additionally, when I ran with both on and the bridge, the computer recognized the SLI bridge and both cards, but still no luck recognizing the USB mouse and keyboard.