Sonnet 8x4 Silent Gen4 PCIe Card

My M2_1 slot does not seem to be detecting my NVME SSDs, they work fine in the M2_2 slot Does anyone know why? I want to use both M2

Eight NVMe SSD slots on a PCIe x16 card Silent operation Add your own ultra-fast SSDs for Mac, Windows, and Linux

m2 slot mainboard 2 connector slot Depending on its type and functionality, an drive can make use of either the standard SATA interface or the faster PCIe (

m2 slot 2 connector are PCI Express x4 , Serial ATA , and USB It is up to the manufacturer