PCIe slot shenanigans

This PCIe x1 to PCIe x16 Slot Extension adapter provides enhanced compatibility between motherboards and a variety of PCI Express expansion cards, allowing you

Most of these things you mention would be bottlenecked by an x1 slot x1 maxes out at under 1GBs, so you won't see the full benefit of NVMe,

x16pciexp slot The PCIe x1 slot is the smallest PCI Express slot and has the lowest throughput compared to larger PCIe slots such as the PCIe x16 slot However

x1 pcie slot 2 PCIe adapter ONLY supports PCI-e NVMe based M Key , NOT supports any SATA based SSD Fit for PCIe x1x4 x8 x16 slot