No, it's not. There's been a similar question regarding the Samsung 980 m2 Pro. Both Samsung SSD are key M, but the Delock card supports key B or key B+M. For an explanation of the different key types, have a look on the Delock site: https://www.delock.com/infothek...
The product description of the adapter card can be found here: https://www.delock.com/produkte...

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