Question about Seagate FireCuda 520

but of course.
As far as I can see, however, "only" Gen3 ports are installed on the board, i.e. you can/must expect 3000-3500MB/s instead of 4000-5000 as specified.

Would fit as the board has M.2 M Key slots BUT the memory supports PCI Express version 4.0 but the board supports max. 3.0.

The memory would therefore also run with 3.0 (is downward compatible) and therefore cannot exploit its full potential, the specified read/write throughputs have of course been measured with 4.0.

Now, if no new board (with PCI Express version 4.0) is to be purchased in the near future, one could also consider an equivalently cheaper memory with PCI Express version 3.0.

For example Samsung 970 EVO (1000GB, M.2 2280)