capturecard or sli

[Omnipotato]

i plan on livestreaming OBS. however i only have one gtx650. it runs well but i want more power and fps. should i sli my current gtx650 to another gtx650 or should i just get a AverMedia Livegamer HD Capture card? thanks

 

[Mousemonkey]

http://www.tomshardware.co.uk/answers/id-1976112/gtx650-gt630.html