Will a M+B key 8x Sata card work in a M key socket?

: Buy Sintech M-Key AE Key,NGFF WiFi Card to m 2 slot key m 2 SSD up to Gen5 x4 128Gbs; XXL aluminum cooling fin; Dual variable 2 Sockets , supports type 22422260228025802211025110 PCIe Gen5x4 m2 pcie slot The specification identifies 12 key IDs on the module card and socket interface, but SSDs typically use three common keys: B, M, and B+M

m2 pcie 40 in 30 slot 2 M key slot is compatible with both B+M key SSD and M key SSD The last but not least, you should check whether the slot supports PCIe (