Can I run SLI with this board?

Scooby2867

Distinguished
Jan 30, 2012
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I am currently running this setup

I5 2500k
GIGABYTE GA-Z68X-UD4-B3 LGA
EVGA 660Ti SC
16gb RAM
Corsair 750w PSU
1x WD Caviar Black
1x 128gb Crucial SSD
1x 240gb Mushkin SSD


If i was to buy another 660TI would i be able to run them in SLI with my current board or would I not see any type of performance increase?