Igpu uses RAM, which is usually larger than 8gb, so it can run just fine.
The game, however, can’t spread the memory across Vram and RAM.
There are 2 things that can happen if you are out of Vram buffer capabilities. Either it slows down to the speed of RAM, which means less performance and/or texture pop up. Sometimes even meshes won’t load. Other option is crash. Cyberpunk, for example, will ceash at 3.5+ gigabytes of memory messing with VRAM/RAM combination.
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That’s just memory allocation.
Igpu uses RAM, which is usually larger than 8gb, so it can run just fine.
The game, however, can’t spread the memory across Vram and RAM.
There are 2 things that can happen if you are out of Vram buffer capabilities. Either it slows down to the speed of RAM, which means less performance and/or texture pop up. Sometimes even meshes won’t load. Other option is crash. Cyberpunk, for example, will ceash at 3.5+ gigabytes of memory messing with VRAM/RAM combination.