Games stutter and lag after crossfiring my R9 270x

[Coopey08]

I recently bought a second r9 270x and after installing it and the latest drivers i lag in game where i wouldn't have before.Also i have unplugged the second one and it now still lags.

Thanks

 

[bootcher]

Revert to other drivers/originally installed drivers. Use DDU to uninstall current drivers first.

 

[Coopey08]

Revert to other drivers/originally installed drivers. Use DDU to uninstall current drivers first.

Thanks