Hi!
I recently fought with high VRAM usage. Weirdly, my nvidia PC uses 6GB VRAM while the AMD PC uses 8GB. While investigating using the resource viewer tool, I got interested in the Nanite ClusterPageData buffer. I couldn’t reduce it by CVAR so I took a look into the engine code.
UE allocates 4GB by default on AMD cards instead of 2GB everywhere else.
Now I am just wondering. Why is this hardcoded and why do AMD cards get 2GB VRAM per default more?
Not saying that this is wrong. But I would like to gain insight to the reasoning for this.
NaniteStreamingManager.cpp on UE5.6:
