I know this has happened before, but here we are again. Some update appears to have dramatically increased the GPU usage or VRAM and now the game is unplayable, even with framerate capped at 60fps. Every 3-5 seconds the game lag spikes for a couple seconds. This does not happen with any other games and I have deconflicted with other software - it is ONLY occurring in d2r ROTW. Please fix!!!
looks like summer heat has took a toll on your gaming rig, try to dust-clean all the heasinks, and genreally the chasis… i myself actually damaged my main gaming rig when starting it on the worse heat spike day.. it froze, and now when it starts BSOD appears and says critical system component malfunction 
.. so i resorted to my laptop for now..
probably another busted cap, i had them replaced 2 years ago.. though i haven’t picked top quality replacement caps, scrooging my way out of that servicing.. and it bit me in the butt in the end.
The game now uses over 7 GB of VRAM. Once VRAM is full, the GPU spills over into system RAM, and the PCIe bandwidth bottleneck causes a massive FPS drop. I don’t remember this game ever using this much VRAM.