I build mining rigs as a side hustle and also build rigs for myself. Bought for business use and 30 out of 36 did not work. An absolute piece of crap that wasted 5 hours of my day costing me $400+ spending hours and hours troubleshooting why my installs weren't working. I have to stick with what works and those are the old GPU adapters from UBIT. I bought about 250 risers from a UBIT vendor and none of them worked. Do not buy from this seller and do not buy these risers. garbage around.