NVAPI_GPU_NOT_POWERED

[CHM]

Without any further info about the plaintext this is not possible to crack. Two slashes and only capital letters (and numbers and dots?) is not enough info at that length.

And don't use "decrypted" with hashes. Hashes are not decrypted.

What additional info would be required then? As I've said, I'm a complete noob about this and I really need help. I know what it's supposed to look like, the plaintext length and even some parts of the final plaintext. It must be N975U1UEU2xSLy/N975U1OYM2xSLy/N975U1UEU2xSLy and then apply this logic to other similar hashes from the same list that are different but are small variations of the aformentionned plaintext.
In the plaintext here, x and y are the unknowns and are constant. x is either A, B, C or Z. y is a number in this example but might be a letter too (capital letter) in other hashes from the list.