Posted January 24, 2021
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It's kinda weird, but I have a Home notebook that can run games that requires 4gb ~ 6gb VRAM. Sometimes it surprises me. The CPU is only 1,7 Ghz in that one.
That being said, Intel HD Graphics chips will "borrow" from system RAM and use it as VRAM, since they do not come with any dedicated memory chips of their own. This is not always the case, as some AMD integrated graphics have HBM VRAM on-die and some Intel Iris Graphics chips come with some integrated cache memory (though that is still technically not VRAM, it does help performance).
So yes, as long as you have plenty of RAM, I am not too surprised some AAA games will run on an Intel HD Graphics chip, albeit I don't expect them to run well, since those chips are only targeted at multimedia consumption and light gaming.
To make matters worse, integrated graphics usually share power budget with the CPU. Games will usually stress both in various amounts at various times, in which cases bottlenecking may become way more obvious than on a desktop with a dedicated graphics card.
Post edited January 24, 2021 by WinterSnowfall