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My question has two parts. First, I am having a hard time understanding how much video memory Intel's integrated graphics like Intel HD Graphics 5500 support. Specs for Core i3-5005U shows 16 GB for Graphics Video Max Memory. Does this mean that this Intel HD 5500 can use up to 16 GB of memory?
If so, then another question that strikes me is 16 GB is pretty huge memory. However, NoteBook Check says that this video card can run many popular 2014/2015 games will run fluently only at very low settings. What determines how powerful a video card is?

  • It looks like it is :) – jehutyy Apr 21 '17 at 14:17
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Since the GPU and CPU share the same RAM, the available GPU memory will be the amount of free memory reported by the OS.

I clicked the ? button next to "Graphics Video Max Memory" on the link you posted.

Graphics Video Max Memory

The maximum amount of memory accessible to processor graphics. Processor graphics operates on the same physical memory as the CPU (subject to OS, driver, and other system limitations).

EDIT: (for your additional question)

http://www.pcgamer.com/how-to-buy-a-graphics-card-six-things-you-must-know-about-gpus/

Memory: size doesn't matter, but bandwidth is critical

Selecting a graphics card because it has more memory is like choosing an exotic car based on the size of the gas tank. The unwarranted fixation on the amount of RAM is the biggest, most common mistake made by gamers looking to buy graphics hardware.

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