Strix Z370-E HDD LED issue with both NVME slots filled

A Deep Dive into PCIe Lane Values of PCIe NVMe Cards pcie nvme slot NVMe PCIe adaptor on eBay: bx3B0A NVMe SSDs on eBay: http: pcie x1 in x16 slot If you're looking to add a PCI ExpressNVMe drive to a desktop with an older motherboard that lacks slots, one option is an drive on a carrier card

pciex16 slot configuration is a form factor, there are a few variants for different applications, but the variant we are interested in for NVME SSDs is M key This