Which would be better for graphic design

gferrin2012

Honorable
Jun 3, 2013
237
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10,710
I mainly do light computer graphic's as well as light video editing and have a quick question.
First, my build:
cpu: i7-3770k
mobo: asrock extreme 6 z77
boot drive: 256 samsung ssd
storage: 2tb WD black
ram: crucial tactical 16GB
I was looking at purchasing the video card to finish this build. My question is would a msi 660 ti 2gb PE be better then two 650 ti 2gb cards run in sli.
Thank you in advance for any advice.