Never heard of minerparts.  Looks like a a bunch of old stock items.  I would just get Mintcell v006c 6pin powered risers.  I use about 80 of these and never had an issue besides the insulator foam falling off.  https://www.amazon.com/MintCell-6-Pack-Powered-Adapter-Extension/dp/B06ZY2R85P/  I think he has a store on newegg too.  Just make sure you are buying from Mintcell and not a clone.