pci express - Special PCIe x8 in regular PCIe x16 slot? - Super ...
Is it safe to plug it into a regular PCIe x16 slot on a desktop motherboard? The pic is HP NC375i NIC.
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How to Add More M.2 SSD Slots? - PC Guide 101
If you have an NVMe-capable M.2 slot on your motherboard, then this is where to install your system drive.