Actually there are three slots, one is half size, and all can accept NAME or SATA m.2 drives ( I have used both full size slots for NVME myself)
Samsung - 960 EVO 1TB Internal PCI Express 3.0 x4 (NVMe) Solid State Drive for Laptops
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Samsung - 960 PRO 1TB Internal PCI Express 3.0 x4 (NVMe) Solid State Drive
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