Quote Originally Posted by Stelios View Post
I confirm the SLI problem (I have two 580 GTX)

It just don't wont to work with the latest 1409 bios . With 1485 is fine.

When using 1409 , with any driver up to 270.X it doesn't give you the option to select SLI in nvidia control panel . Only thing you can select is the physx processor .
If you try with the 275.X drivers and select SLI , the nvidia panel freezes and the 2nd VGA gives a yellow exclamation in device manager .
Hi,

Are you running stock GPU BIOSes? If you are:

Try uninstalling the second card via device manager, and then reinstall, wait for standard VGA drivers to install and then reboot and reinstall the nV drivers.

If that does not work then a reinstall may be needed.

-Raja