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What is IGD Aperture Size?
Documentation
Content Type Product Information & Documentation
Article ID 000028294
Last Reviewed 07/13/2020
Most BIOS or Unified Extensible Firmware Interfaces [UEFI] define the Graphics Video Max Memory as the maximum amount of system memory dedicated to integrated graphics solely for an Integrated Graphics Device [IGD]. This memory is never available for regular system memory, instead it's utilized for: Some BIOS or UEFIs also allow users to define IGD Aperture Size, which provides the size of Peripheral Component Interconnect Express [PCIe] Base Address Registers [BAR]/Window for integrated graphics. The PCIe BAR/Window for integrated graphics is provided in two cases:Caution
Changing IGD Aperture Size settings in BIOS may result in varied system performance.
- Application requires direct access to system memory dedicated for integrated graphics.
- Application requiring de-swizzle or linearize view of graphics data [only applicable to Windows® 7 or older operating systems. Not applicable to Windows® 10].
Applications interact with BAR, which in turn redirects to the system memory that is dedicated for integrated graphics or regular system memory for de-swizzle. A large IGD Aperture Size is not a good idea 100% of the time, since this will increase BAR space in system address space.
IGD Aperture Size [Default] = 256 MB [for 10th Generation Intel® processors and older]
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