https://www.ebay.com/itm/HP-HSTNS-PD18-DPS-750RB-A-506822-101-506821-001-750W-S-HE-DL-380-G6-ML370-G6-PS/111384859283?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2648

I just bought some of them without realizing there might be multiple versions of the DPS-750RB with different efficiencies. If you compare the picture of the label on the ones they sell over at parallelminer, they're slightly different compared to what the ebay listing says. Not sure if it matters.