NVMe SSD 50% slower on socket 1

A careful review of the motherboard manual does not show putting an NVMe drive, or an SATA drive, in the slot would cause any

Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors; 8+2+1 Power Phase, ; 2 x DDR5 DIMMs, Supports Dual Channel, up to 7200+ ;

nvme slot MotherBoards Icon MotherBoards · Memory Icon Memory · Graphic ASUSTOR FLASHSTOR 6 - 6x NVMe slots-image ASUSTOR FLASHSTOR 6

nvme in pcie slot ASUS ROG STRIX B550-A GAMING ATX Motherboard For AMD Ryzen 3rd Gen 5000 Series CPU, Socket AM4 - AMD B550 Chipset - PCIe - 2x