Some strange problems with ram usage

[[Unknown]]

Something funny is going on. Everything you describe sounds completely consistent with having xBRZ texture scaling enabled at e.g. >= 2x. But I don't know how HT could be affecting it.

Based on that, it really sounds like it must be a driver problem, especially the buffered rendering thing. Maybe a software renderer or Direct3D renderer would do better, but unfortunately those aren't near-term things necessarily...

-[Unknown]