Editing Dynamic random-access memory (section)

===Graphics RAM===
Graphics RAMs are asynchronous and synchronous DRAMs designed for graphics-related tasks such as [[texture memory]] and [[framebuffer]]s, found on [[video card]]s.

====Video DRAM====
{{Main|VRAM}}

Video DRAM (VRAM) is a [[dual-ported RAM|dual-ported]] variant of DRAM that was once commonly used to store the frame-buffer in some [[graphics card|graphics adaptors]].

===={{Anchor|WRAM}}Window DRAM====
Window DRAM (WRAM) is a variant of VRAM that was once used in graphics adaptors such as the [[Matrox]] Millennium and [[Rage Pro#3D Rage Pro & Rage IIc|ATI 3D Rage Pro]]. WRAM was designed to perform better and cost less than VRAM. WRAM offered up to 25% greater bandwidth than VRAM and accelerated commonly used graphical operations such as text drawing and block fills.<ref name="wramdef">{{cite web |url=http://www.pcguide.com/ref/video/techWRAM-c.html |title=Window RAM (WRAM) |archive-url=https://web.archive.org/web/20100102101703/http://pcguide.com/ref/video/techWRAM-c.html |archive-date=2010-01-02}}</ref>

===={{Anchor|MDRAM}}Multibank DRAM====
[[File:MoSys MD908.png|thumb|[[MoSys]] MDRAM MD908]]
Multibank DRAM (MDRAM) is a type of specialized DRAM developed by [[MoSys]]. It is constructed from small [[memory bank]]s of {{nowrap|256 kB}}, which are operated in an [[Interleaved memory|interleaved]] fashion, providing bandwidths suitable for graphics cards at a lower cost to memories such as [[Static Random Access Memory|SRAM]]. MDRAM also allows operations to two banks in a single clock cycle, permitting multiple concurrent accesses to occur if the accesses were independent. MDRAM was primarily used in graphic cards, such as those featuring the [[Tseng Labs]] ET6x00 chipsets. Boards based upon this chipset often had the unusual capacity of {{nowrap|2.25 MB}} because of MDRAM's ability to be implemented more easily with such capacities. A graphics card with {{nowrap|2.25 MB}} of MDRAM had enough memory to provide 24-bit color at a resolution of 1024×768&mdash;a very popular setting at the time.

===={{Anchor|SGRAM}}Synchronous graphics RAM====
Synchronous graphics RAM (SGRAM) is a specialized form of SDRAM for graphics adaptors. It adds functions such as [[bit mask]]ing (writing to a specified bit plane without affecting the others) and block write (filling a block of memory with a single colour). Unlike VRAM and WRAM, SGRAM is single-ported. However, it can open two memory pages at once, which simulates the dual-port nature of other video RAM technologies.

====Graphics double data rate SDRAM====
{{Main|GDDR}}
[[File:Sapphire Ultimate HD 4670 512MB - Qimonda HYB18H512321BF-10-93577.jpg|alt=|thumb|A 512-MBit [[Qimonda]] GDDR3 SDRAM package]]
[[File:SAMSUNG@QDDR3-SDRAM@256MBit@K5J55323QF-GC16 Stack-DSC01340-DSC01367 - ZS-retouched.jpg|thumb|Inside a Samsung GDDR3 256-MBit package]]
Graphics double data rate SDRAM is a type of specialized [[Double data rate|DDR]] [[Synchronous dynamic random-access memory|SDRAM]] designed to be used as the main memory of [[graphics processing unit]]s (GPUs). GDDR SDRAM is distinct from commodity types of DDR SDRAM such as DDR3, although they share some core technologies. Their primary characteristics are higher clock frequencies for both the DRAM core and I/O interface, which provides greater memory bandwidth for GPUs. As of 2020, there are seven, successive generations of GDDR: [[GDDR2]], [[GDDR3]], [[GDDR4]], [[GDDR5]], [[GDDR5X]], [[GDDR6]] and [[GDDR6X]].