gtx660 cuda supported video conversion software

i used to use video converter ultimate but i can enable cuda for my evga 660SC…Any workaround or video converter that does support these cards (i am running 2 in sli in case that makes a difference…if this post is in the wrong place im sorry for that…just got an account here and didnt see anything for this type of post…TIA

Hello. I cant turn on cuda in Video Converter.