you are not going to get your money back ... but a GPU is a GPU .. better use another 7970 for Xfire and enjoy some good looking games for a long time :>
Check if your PSU can provide enough power also.
Well I will still have some fun all the same and like you say there is the gaming option... Obviously this is not aimed and mining bitcoin btw...
So what you reckon? 7950 or 7970?
Power should be okay. TX750