Use the forum search function to look for a thread titled "SLI is working" or something similar. Alternatively, use the forum search to look for posts made by 335th_GRAthos.
He was posting in that thread along with other users and giving some good advice.
There's not a dedicated cliffs of dover SLI profile yet in the drivers, so it involves manually setting some things in the drivers options, but they were very thorough in their explanations and posted some screenshots too confirming it works.
I think that thread is your best bet, cheers
