Thank you all for the answers.
I was asking this because i bought two, but only one is for me, the other is for a friend and i wanted to try/check the power of them, not to keep the two gpu, only one is for me. Was just for testing. And i got them for very good price, i had 4 (yes 4!) Gtx 970 but all of them hard coil whine, thats why i searched for a cheap and good alternative.