The '''graphics addressaperture remapping table''' ('''GART''')<ref>[http://support.amd.com/techdocs/25112.pdfSoftware Optimization Guide for AMD64 Processors]</ref> or '''AGP-GART''' when used with [[Accelerated Graphics Port]], sometimes known as the '''graphics translation table''' ('''GTT'''),<ref>{{cite web|author=freedesktop.org|url=http://dri.freedesktop.org/wiki/GART|title=GART|accessdate=2010-03-05}}</ref>, and often misintepreted as '''graphics address remapping table''' is an [[IOMMU|I/O memory management unit]] (IOMMU) usedallowing bythe [[Acceleratedgraphics Graphicscard Port]]to (AGP)perform anda [[PCIdirect Expressmemory access]] (PCIeDMA) [[graphicsto card]]sthe host system memory. TheIntroduced GARTby allowsAMD thefor graphicsmapping cardof 32-bit AGP [[directgraphics memory accesscard]]s (DMA)accesses to the host system64-bit memory, throughwhich buffersspace of the [[texture mapping|texturesAMD64]] processors<ref>[https://pdfs.semanticscholar.org/60f1/35af3eb5253394f4ff944062a1b9e6a0c564.pdf Utilizing IOMMUs for Virtualization in Linux and Xen]</ref>, it was later reused for [[polygonPCI meshExpress]]esand(PCIe) otheras datawell. are loaded.
GART is used as a means of data transfer between the [[primary storage|main memory]] and [[video memory]] through which buffers of [[texture mapping|textures]], [[polygon mesh]]es and other data are loaded, but can also be used to expand the amount of video memory available for graphics cards, particularly for cards with no dedicated video memory such as [[Intel HD Graphics]] processors.
