Can someone explain NVMe to me? The 4x PCIe lanes doesn't

m 2 slot with pcie x4 lanes
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Just as an example the very popular 918+ and 920+ are both limited to PCI-E and also only offer a maximum of two lanes per NVME drive

The top slot that has the heat-sink on it does use PCIe lanes If you use it your x16 PCIe slot will only use x8 speeds

m2 vs nvme slot 2 X16 PCIe X4 Expansion Card Supports 4 NVMe up to 256Gbps for AMD 3rd Ryzen sTRX40, AM4 Socket and Intel VROC NVMe Raid

m2 nvme slot As slot 7 is a PCIe gen3 slot, and that gen3 is half the speed of gen4, we can consider that it can use 2 lanes of gen4 Thus, in total, these