Verilux NVIDIA NVME Adapter PCIe x16 with Gel Pad,

2 slot doesn't guarantee NVMe compatibility was designed to support USB , SATA, and PCIe, and most early slots supported only SATA

Intel has numerous desktop boards with the PCIe x1 Mini-Card slot that typically do not support mSATA SSD replaces the mSATA standard and Mini PCIe

m2 slot is a slot that can interface with SATA , PCI Express

m24 slot This video explains how to select which slot to use on a motherboard for the best storage