Just got this EVGA G2 750 in about a week ago, noticed a sound coming from the fan. I believe it is a bearing fan and not a sleeved version. I do not have much experience with these so don't know if its normal:
https://drive.google.com/file/d/0B0889u7QTNtkRmZYT0Izb1M2NGs/view
https://drive.google.com/file/d/0B0889u7QTNtkRmZYT0Izb1M2NGs/view