Nixos-generate-config
This command analyzes your hardware configuration and generates two files of:
configuration.nix
hardware-configuration.nix
hardware specific notes
If you are using an SSD it may be useful to enable TRIM support as well as set filesystem flags to improve the SSD performance:
fileSystems."/".options = [ "noatime" "nodiratime" "discard" ];
A collection of hardware specific platforms with their config can be found at NixOS Hardware repository