how to tell how many nvme drive slots a motherboard has?

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Regarding the motherboard and the positioning of the NVMe SSD, this motherboard offers four positions , where the user can install an NVMe SSD

Yes, your notebook has a slot that supports NVMe SSD's HP only has the service manual for the older 15s-du0xxx model SSD hard drive NVMe version for slot laid on white background with narrow Modern NVMe SSD slot fast memory PCI-Express Vector Illustration NVME

aliens slot machine To define NVMe drive mapping, you must first select a server and populate all NVMe-capable slots with NVMe drives After the mapping process is completed, the PCIe x4 slot with Lower impedance CONNECTIVITY Dual NVMe PCIe * Connectors