The worst factor about M.2 right now's a normal scarcity of parts. The Intel SSD is keyed for slots B and M, so it suits in the correct slot. The slot on the left makes use of module key E, and the one on the correct makes use of module key B. https://Xn--l3ca4bwe5b2b.net/category/%e0%b8%84%e0%b8%a5%e0%b8%b4%e0%b8%9b%e0%b8%ab%e0%b8%a5%e0%b8%b8%e0%b8%94/