GTA V showcases vibrant textures.
GTA V showcases vibrant textures.
Your problem probably lies with the GPU. However, a friend of mine had the same issue until he swapped his SSD for an HDD, which resolved it—then he discovered the SSD was faulty. First, verify the read speeds on your HDD. Another solution I've encountered is setting the game's priority to HIGH in the task manager. If the HDD is functioning well and adjusting the priority doesn't help, then the GPU is likely the cause.
It's likely due to differences in gameplay mechanics or server configurations between GTA Online and Story Mode.
Do you tune into Self Radio? If so, try to avoid it. It's odd, but I faced a comparable issue and resolved it in a similar manner.
Open Task Manager, adjust CPU priority to High. Thank me later.