Can too much Occlusion Culling cause lag?

[polis_putrus]

Can too many objects suddenly coming to view cause lag, for example this (Horizon Zero Dawn) video, I think overuses occlusion culling, I could be wrong, but in that specific game, what if you spun the camera around very quick, can the game loading too many objects cause lag?

Also another example that I also think is a little overused here skip to 1:00 and watch how many objects suddenly start loading on the right, could this cause lag? or am I completely wrong, and its easy for a computer to do? I understand Occlusion Culling is a method of optimization to reduce draw calls.

 

[Solandri]

Lag when lots of objects suddenly come into view is usually due to the GPU having to load textures off disk. The textures for some of the new objects were dropped by the GPU to make more room in VRAM for other textures. Since disk is roughly 1000x to 10,000x slower than VRAM, you get a big lag stutter when the GPU is forced to load textures from disk.

Try dropping down the texture quality one notch (each step up in texture quality uses 4x more VRAM). If that helps, make sure your next GPU has more VRAM.

 

[polis_putrus]

My GPU has 4GB VRAM, I never had any problem specifically because of occlusion culling, Im just interested in it, also you know how the memory bandwidth on some graphics cards are 50 to like 100 or so, is this responsible for the very quick loading of textures and objects? just wondering, cause 80GB bandwidth on my K2200, I thought was a ton, but some graphics cards have like 100GB bandwidth.