Flickering/shimmering - getting desperate! Help!

[Muninnhrafn]

Hello. It's mostly, like the title suggests, shadows, foliage, walls, stairs and random objects.

Here is my rig: geforce gtx 770
intel core i5-4670K CPU @ 3.40 GHz
8gb ram
windows 7 64 bit home

https://www.youtube.com/watch?v=DoCyHEBwQDY

Here's an example. In the loading screen, look at the chair. Ignore the rest of the video. And sorry for the quality, but the problem is very visible in any case.

I would also like to add that I've tried the NVIDIA inspector, sweetFX and yes, my drivers are all up to date (340.52).

Is my card broken?

EDIT: BETTER EXAMPLES: (notice the desperate people with no solutions): https://www.youtube.com/watch?v=rlg4C0_3fUM https://www.youtube.com/watch?v=Uzff...ature=youtu.be