Here is the detailed tutorial on how to fix fps drops on No Man's Sky Game:
- Try to disable VSync and GSync from the settings or txt file.
- Set Anisotropic Filtering to "4"
- Locate the TKGRAPHICSSETTINGS.MXML file (in Steam this is located here: Steam\SteamApps\common\No Man's Sky\Binaries\SETTINGS\TKGRAPHICSSETTINGS.MXML) and open it in notepad.
Scan down the list until you see "FoVOnFoot" and "FoVInShip".
Change the value="" number to whatever works for you.