The motherboard slot #1 shares bandwidth with SATA Gbs

Where does a SATA3 go in my motherboard SATA slots? sata 3 slot 4,1-5,1 have SATA hardwired to the mainboard SATA ports 4,15,1 have SATA wired to slot 4 but likely very sata slot If a PCIe gen 3 slot has been downgraded to PCIe gen 1 or 2 via BIOS your new card won't provide you with the bandwidth you need Also, I

sata 3 slot No, there's a reason your slot says “SATA III” and not “NVMe” NVMe don't use SATA connectors at all, they use PCIe lanes