Unknown Bottleneck ??

[spp85]

Hi buddies. I am facing a strange bottleneck in some rare places at Far Cry 4 game. For making it clear I have added a screenshot of Far Cry 4 displaying FPS, GPU usage and CPU usage .
If we look closely the GPU usage at this particular area is just around 65-75% only, resulting 33 fps . The CPU usage at 53% seems not bottleneck either. My average FPS is 50+ in this game at max settings 1080P. Then why the frame rate dip at this location ??

My Configuration is
Core i5 750 @ 3.6Ghz
DDR3 8 GB 1800Mhz
Radeon HD 7950 Vapor X overclocked

 

[Brillis Wuce]

So your FPS dips at when you're just at that location in the game? Nowhere else?

 

[HEXiT]

probably down to polygon mesh rat nests. there found in pretty much every game. (2 or more pollys inhabit the same 3d space and cause an error.

bf3 on market place for instance plays at 60+fps but look at the alley south of the market and the fps drops dramatically. even though all your doing is looking at a blank wall.

what can you do about it? you can try adjusting the tessellation level (sometimes untangles the ratnests) other than that not a lot.