For anyone who was looking to find the scaling of this card in Sli here is the link:
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_650_Ti_Boost_SLI/
If its a game that has enough going on and enough eye candy to put a card to work, where having a second card would be helpful, THAT is a game that will support SLI. so yes, you can say games dont all support SLI so a single card is always better, but thats like saying having a quad core CPU is less effetive then a dual core because more games use only two cores. Its an ignorant blanket statement