[Windows10]Allocate More System Memory to Onboard Graphics

Dedicated graphics cards include their own video RAM (VRAM) on the card itself. This memory is dedicated to textures and other graphics-processing functions.

Onboard graphics don’t include separate RAM. Instead, the chip simply “reserves” some of the RAM on your motherboard and treats it as video RAM.

There’s a trade-off here. The more RAM you allocate to your onboard graphics, the more VRAM it has. However, the more RAM you allocate to your onboard graphics, the less memory you have for general purpose use. That’s why you can sometimes customize exactly how much RAM you want to allocate to your video card in your computer’s BIOS or UEFI firmware.

This is something to tweak, but it’s tough to say whether it would help. You may want to try changing this option and see what happens. If your Intel graphics is starved for RAM, allocating more of your system’s RAM to it can speed things up. If your Intel graphics has more than enough memory for the game you want to play, but your computer is running out of normal RAM, allocating more RAM to VRAM will just slow things down.

To find this setting, restart your computer and press the appropriate key to enter the BIOS or UEFI firmware settings screen while it boots. This is often the F1, F2, Delete, F10, or F12 key. Consult your computer’s manual for more details, or just perform a web search for your PC’s model name and number as well as “enter BIOS.”

In the BIOS or UEFI settings screen, locate the integrated graphics options and look for an option that controls the amount of memory allocated to the integrated graphics hardware. It may be buried under “Advanced,” “Chipset Configuration,” or another such menu. Note that not every computer has this option in its BIOS–many don’t. You may or may not be able to change this.

[출처 : https://www.howtogeek.com/245592/how-to-improve-gaming-performance-with-intel-hd-graphics-chips/]

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If you have a desktop, you are lucky - almost all desktop computers have a setting in the BIOS which lets you specify the exact amount of "dedicated" memory Intel HD Graphics should allocate from system RAM. All you have to do it to enter the BIOS, which is usually done by pressing <F2>, <F10> or <Del> right after your computer starts. Take a look at the initial screen to see the exact key you should press or consult your motherboard user's manual. When you enter the BIOS, look for the Intel HD Graphics share memory setting, which is usually placed in a category like "Advanced", "Chipset Configuration" or something like that, if you cannot find it, consult your motherboard user's manual again, as it should be listed there. The screenshot below shows how this setting looks like on an Asrock motherboard.

When you find the setting simply set the amount of "dedicated" memory your want your Intel HD Graphics to allocate when your computer starts and press <F10> to save the settings and reboot your computer. Please, note that this memory is not actually dedicated, but is rather taken from system RAM, so if your computer has only 2GB of RAM do not set it too high as you will be left with only a small amount of system memory and your computer's performance will suffer. Refer to the table below for the recommended amount of video memory based on the amount of RAM you have:

VGA share Memory Size

RAM	Recommended Video Memory
2GB	256MB
4GB	512MB
8GB or more	1024MB or more

This will make almost all games, if not smoothly playable, at least able to run on your computer.

[출처 : http://www.pvladov.com/2013/10/increase-intel-hd-graphics-dedicated-video-memory.html]