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Officially, Heroes of Might and Magic V (at least "Tribes of the East") requires 2 GB of memory, but in reality, you need at least 4 GB. Also, like the vast majority of applications developed in the 2000s, this game is 32-bit. I use 16 GB of RAM and 8 GB of NVIDIA video memory, and the sensors are displayed by MSI Afterburner + RivaTuner. All settings are at their minimum (if I increase the quality, it increases the likelihood of textures not loading, meaning they will often "wash out"). Enough introductions, I'll start the experiments.
The main menu immediately after launch consumes approximately 500 MB of memory.
The "Dragon Pass" map when loading takes up 500-720 MB.
The Order faction's city adds an additional 40 MB, and hovering over a building adds another 16 MB.
The Inferno faction's city adds +20 MB, and a building adds the same.
The Necropolis faction's city adds a huge +110 MB, and hovering over a building adds +40 MB. It's clear that with such memory consumption, the game can crash, which is what happened twice.
The Forest Union faction's city adds +60 MB, and a building adds +30 MB.
The League of Shadows faction's city adds +20 MB, and a building adds +25 MB.
The Academy faction's city adds +40 MB, and a building adds +20 MB.
The Northern Clans faction's city adds +60 MB, and a building adds +16 MB.
The Great Horde faction's city adds +80 MB, and a building adds about +20 MB.
Yes, indeed. The recommended RAM requirements are insufficient.
P. S. I hope my topic is written clearly, because the "Heroes 5 Technical Support" section covers all hardware and software aspects.