Short answer, yes!
The sli config will just match the two cards at the lowest spec. So will run at default speec of the non-oc version you named. It should run fine.
Thank you Keith ! Glad that it will work fine, my bro upgraded to 660 ti so he gave his card to me. SLI config should at least match the regular 570 or 580 and should still run the latest and demanding games at decent & playable settings.