VRAM overflow with 4070-ti

That is actually the opposite of what I am recommending. Have a look at this as an example:

The excerpt above is from my post here: KDE5/QT5 And Lower Are Anti-Nvidia?

Though your setup may be different (as I have an onboard Intel GPU), you do have an Nvidia card. These cards cause issues with everything they feel like causing an issue with. Examples of these issues can be seen in the linked post.