For the SSD drive I would defiantly go with the M2 drive cost the same and no cabling (neater) and if you can afford the SSD M2 MVMe it's 4 x faster than SATA cost is not much more.
For graphics card depends on which game your going to play, a good start is to go to the game web site to see what the minimum graphics card is required.
Joezep
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