COMMON FIXES
Below is a collection of fixes for some common problems.
Potential fixes for low or unsteady FPS:
Navigate to your Steam directory and open the file No Man's Sky\Binaries\Settings\TKGRAPHICSSETTINGS.MXML. You can open it using Notepad or any other basic text editor. Try changing the "Gysnc" value to "False." Note that this has not worked for some users, and it likely will have either no effect or an adverse effect if you have a Gsync-enabled monitor. Some users have reported that turning this off has greatly improved FPS.
Use Borderless Window instead of Full Screen. You can change this via the in-game setings or via the file No Man's Sky\Binaries\Settings\TKGRAPHICSSETTINGS.MXML. In general, your framerate will be slightly higher and more stable using Borderless Window. Full Screen seems to have some bugs at the moment.
Set the max FPS setting to MAX. This setting is currently bugged and seems to give a much lower framerate than what it is set to. Maxing out the value will help resolve this. It can be changed via the in-game settings or via the file No Man's Sky\Binaries\Settings\TKGRAPHICSSETTINGS.MXML (if using the file, change it to 160).
Disabling in-game anti-aliasing seems to reduce some FPS issues. Currently, the AA setting appears to be bugged and has no visual effect, outside of some FPS woes. You can force AA on using your NVIDIA or AMD control panels, which appear to have some limited success.
Disabling VSync via the in-game settings has reportedly helped with some performance problems. Along with a number of other settings, VSync does not appear to be functioning properly yet for many people.
NVIDIA users: Installing the OpenGL driver may help with FPS issues. It can be downloaded at https://developer.nvidia.com/opengl-driver.
AMD users: There is a recent AMD beta driver that some users have reported helps resolve some performance problems. The driver can be found at http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-Edition-16-8-2-Release-Notes.aspx.
Some people have reported that setting NMS.exe to high performance via the Windows Task Manager has helped with some crashing and stuttering issues.
If you have an SSD, some users have experienced improved performance when having the game installed on a normal HDD. If possible, try moving to game to see if it improves performance.
For some people, Steam Overlay was causing some issues with stuttering. You can try disabling the Overlay in your Steam settings to see if it helps.
Triple buffering may help reduce large FPS drops when using VSync. Details can be found here: https://www.reddit.com/r/NoMansSkyTheGame/comments/4xl7eg/pc_nms_is_an_opengl_game_so_that_means_you_can/
If you are having issues with performance when streaming, watching videos, or using a second monitor, a possible fix is to actually reduce the priority of the NMS.exe process. Here is additional information: https://www.reddit.com/r/NoMansSkyTheGame/comments/4xmzrf/wanna_stream_pc_version_but_dont_know_how_to_fix/
Potential fixes for blurry visuals and poor resolution:
There is no full fix for this yet. The reason for this is because the game appears to scale up from a lower resolution (potentially 720p, or as some have suggested, half of the selected resolution).
One person has suggested that Anisotropic Filtering is not being applied, which may be the source of the blurry visuals - not upscaling. However, forcing AF through the NVIDIA or AMD control panels does not have a major effect at this time it seems.
Using Full Screen rather than Borderless Window appears to help with this very slightly. Note that Full Screen is otherwise bugged, and may result in some crashes and problems with alt-tabbing.
NVIDIA users: Enabling DSR may help a bit with the blurry graphics. Note that it may or may not help for all users, and may result in some crashes and/or performance problems. A guide on enabling DSR can be found here: http://nvidia.custhelp.com/app/answers/detail/a_id/3587/~/how-to-enable-dynamic-super-resolution-in-games.
Potential fixes for crashes:
Note that many crashes will need to be resolved by Hello Games via patching. It may or may not be something on your end that can be resolved.
If you have an older AMD Phenom processor, your game will likely crash at startup. There is no fix yet. Some users have reported some success with the experimental patch below.
There is now an experimental patch available on Steam. Right click No Man's Sky in Steam and select Properties. Go to the Betas tab and enter the code "3xperimental" without the quotation marks. Then select the experimental build from the drop-down box. This is an early, beta version of a new patch. This resolves a number of crash issues. If installed properly, the game name on Steam will now display as "No Man's Sky [experimental]".
Using Borderless Window rather than Full Screen helps resolve many crashes. Full Screen appears to be somewhat bugged at the moment.
Using your monitor's native resolution has supposedly helped some people with crashing. Using any other resolution appears to cause some problems.
As with any game, make sure your graphics drivers are updated to the most recent versions. Try the NVIDIA OpenGL driver and the AMD beta driver listed above if you are having problems.
This is not specific to No Man's Sky, but verifying your Steam cache never hurts if you are having problems. I have seen a couple people online mentioned that this helped with startup crashes. This can be done by right-clicking the game on Steam.
If you are crashing with an MSVCR100.dll error message, download Microsoft Visual C++ 2010 at https://www.microsoft.com/en-us/download/details.aspx?id=26999.
Some people have reported that setting NMS.exe to high priority via the Windows Task Manager has helped with some crashing and stuttering issues.
If you are crashing at the Hello Games splash screen, your settings file may be corrupted. This may or may not be associated with having manually edited the file. To restore it, verify your Steam cache by right-clicking the game (this may fix it). Alternatively, see this thread for more info: https://www.reddit.com/r/NoMansSkyTheGame/comments/4xle2w/pc_crash_fix_crashing_at_hello_games_logo_check/
If you crash when you alt-tab, open your Task Manager in Windows and locate the NMS.exe process. Right-click it and select "bring to front". If that doesn't work, click the arrow next to the process and switch to the second process.
Potential fixes for getting stuck in-game:
You can use your jetpack infinitely when along the ground or a surface. This will get you out of most situations when you are stuck.
If you fall through the ground or are in a location where the jetpack does not work properly, you can reload a prior save from the menu after hitting Escape.
Potential fixes for poor FOV (field of view):
The FOV settings currently do not function properly. You can fix the FOV via the file No Man's Sky\Binaries\Settings\TKGRAPHICSSETTINGS.MXML. Change "FOVOnFoot" and "FOVInShip" to a higher value. Most PC users have reported that 120.00000, 130.00000, or 140.00000 appear to be suitable for most monitors. The file can be opened with Notepad or any other basic text editor.
Potential fixes for keybindings not working:
Some keybindings currently are bugged, don't fully function, or cannot be changed. There is no known fix at the moment.
Potential fixes for corrupted game files:
Some users have experienced corrupted game files. Reportedly, creatures and planets with special character in the same may be related to this. The only suggestion is to either manually backup your save files or to set Windows to automatically back them up. Additionally, if they are corrupt you may be able to recover them using Windows File History or a third-party tool. See this thread for more information: http://steamcommunity.com/app/275850/discussions/1/360672304897008888/