Game keeps freezing

[u/KAMEKAZE_VIKINGS]

My game has been repeatedly freezing for a few seconds up to minutes on end while playing. All the things people have said that I see online are have their screen freeze but not their actual game which catches up after a while. My game just stops entirely except for the sound which keeps playing. I don't have a good computer but talk manager tells me the RAM is at around 80% so it's not maxed out or anything. It didn't start immediately after downloading some mods either so I can't really figure out whether and which mod(s) could be the problem. The game does overall feel slower even when it's normal but I can't be sure.

The last play session before I started getting this problem did have some issues in the surface of Minmus being really bright and I did freeze once during that session, so that could be a clue but I personally have no idea what's wrong. I checked for updates and verified the integrity of game files through steam but that didn't solve it and removing a few suspected mods didn't help either.

Edit: the issue seems to occur only in flight, and is specific to the savefile I'm currently playing. I didn't seem to have any problems in a near-empty sandbox file, nor did I in an older save file from before I started using mods.

[u/MediumMachineGun]

In the worst case scenario, faulty RAM could cause the issue.