Originally posted by Flare |UKCS|:

There is a mod that lets you edit the cfg of the game to allow for more memory to the texture memory.
Do a search for customgraphicssettings... it should have a cfg from a modder and a metion of BeInEx that you will also need, then you can allow for more vram to stream textures, amongst other hidden settings.

Thanks. Not sure if it's a texture issue though... as I said, I have the same problem even when I run all textures as low. I might try it out in the 30 minutes of playtime I still have before refunding. It sucks that there's no way to fix this short of modding the game :(