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href="https://bs.wikipedia.org/wiki/Video_RAM" title="Video RAM – Bosnisch" lang="bs" hreflang="bs" data-title="Video RAM" data-language-autonym="Bosanski" data-language-local-name="Bosnisch" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/VRAM" title="VRAM – Catalaans" lang="ca" hreflang="ca" data-title="VRAM" data-language-autonym="Català" data-language-local-name="Catalaans" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Video_RAM" title="Video RAM – Tsjechisch" lang="cs" hreflang="cs" data-title="Video RAM" data-language-autonym="Čeština" data-language-local-name="Tsjechisch" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Video_Random_Access_Memory" title="Video Random Access Memory – Duits" lang="de" hreflang="de" data-title="Video Random Access Memory" data-language-autonym="Deutsch" data-language-local-name="Duits" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Dual-ported_video_RAM" title="Dual-ported video RAM – Engels" lang="en" hreflang="en" data-title="Dual-ported video RAM" data-language-autonym="English" data-language-local-name="Engels" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Memoria_gr%C3%A1fica_de_acceso_aleatorio" title="Memoria gráfica de acceso aleatorio – Spaans" lang="es" hreflang="es" data-title="Memoria gráfica de acceso aleatorio" data-language-autonym="Español" data-language-local-name="Spaans" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Video_RAM" title="Video RAM – Fins" lang="fi" hreflang="fi" data-title="Video RAM" data-language-autonym="Suomi" data-language-local-name="Fins" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/VRAM" title="VRAM – Galicisch" lang="gl" hreflang="gl" data-title="VRAM" data-language-autonym="Galego" data-language-local-name="Galicisch" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/VRAM" title="VRAM – Kroatisch" lang="hr" hreflang="hr" data-title="VRAM" data-language-autonym="Hrvatski" data-language-local-name="Kroatisch" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Video_RAM" title="Video RAM – Indonesisch" lang="id" hreflang="id" data-title="Video RAM" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesisch" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/VRAM" title="VRAM – Japans" lang="ja" hreflang="ja" data-title="VRAM" data-language-autonym="日本語" data-language-local-name="Japans" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%91%D0%B5%D0%B9%D0%BD%D0%B5%D0%B6%D0%B0%D0%B4" title="Бейнежад – Kazachs" lang="kk" hreflang="kk" data-title="Бейнежад" data-language-autonym="Қазақша" data-language-local-name="Kazachs" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%93%80%EC%96%BC_%ED%8F%AC%ED%8A%B8_%EB%B9%84%EB%94%94%EC%98%A4_%EB%9E%A8" title="듀얼 포트 비디오 램 – Koreaans" lang="ko" hreflang="ko" data-title="듀얼 포트 비디오 램" data-language-autonym="한국어" data-language-local-name="Koreaans" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/VRAM" title="VRAM – Pools" lang="pl" hreflang="pl" data-title="VRAM" data-language-autonym="Polski" data-language-local-name="Pools" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Dual-ported_video_RAM" title="Dual-ported video RAM – Portugees" lang="pt" hreflang="pt" data-title="Dual-ported video RAM" data-language-autonym="Português" data-language-local-name="Portugees" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/VRAM" title="VRAM – Roemeens" lang="ro" hreflang="ro" data-title="VRAM" data-language-autonym="Română" data-language-local-name="Roemeens" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/VRAM" title="VRAM – Russisch" lang="ru" hreflang="ru" data-title="VRAM" data-language-autonym="Русский" data-language-local-name="Russisch" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/VRAM" title="VRAM – Servisch" lang="sr" hreflang="sr" data-title="VRAM" data-language-autonym="Српски / srpski" data-language-local-name="Servisch" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Grafikminne" title="Grafikminne – Zweeds" lang="sv" hreflang="sv" data-title="Grafikminne" data-language-autonym="Svenska" data-language-local-name="Zweeds" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/VRAM" title="VRAM – Turks" lang="tr" hreflang="tr" data-title="VRAM" data-language-autonym="Türkçe" data-language-local-name="Turks" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk badge-Q70893996 mw-list-item" title=""><a href="https://uk.wikipedia.org/wiki/VRAM" title="VRAM – Oekraïens" lang="uk" hreflang="uk" data-title="VRAM" data-language-autonym="Українська" data-language-local-name="Oekraïens" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Video_RAM" title="Video RAM – Vietnamees" lang="vi" hreflang="vi" 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id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="nl" dir="ltr"><p><b>Video random-access memory</b>, <a href="/wiki/Acroniem" title="Acroniem">acroniem</a> <b>VRAM</b>, is een type <a href="/wiki/Computergeheugen" title="Computergeheugen">computergeheugen</a> dat technisch verwant is aan <a href="/wiki/Dynamic_random_access_memory" class="mw-redirect" title="Dynamic random access memory">DRAM</a>. Het werd in de jaren 80 in vrijwel iedere <a href="/wiki/Homecomputer" title="Homecomputer">homecomputer</a> toegepast en gedurende de jaren 90 voornamelijk toegepast als lokaal geheugen op <a href="/wiki/Videokaart" title="Videokaart">grafische kaarten</a> van <a href="/wiki/Personal_computer" title="Personal computer">personal computers</a>. Het belangrijkste kenmerk van dit type geheugen is de gescheiden in- en uitvoer (<a href="/w/index.php?title=Dual-ported_Random_Access_Memory&action=edit&redlink=1" class="new" title="Dual-ported Random Access Memory (de pagina bestaat niet)">dual-ported RAM</a>), waardoor gelijktijdige schrijf- en leestoegang mogelijk is. </p><p>In de loop van de tijd werd VRAM door andere efficiëntere opslagtechnologieën (bijvoorbeeld <a href="/w/index.php?title=Graphics_Double_Data_Rate&action=edit&redlink=1" class="new" title="Graphics Double Data Rate (de pagina bestaat niet)">GDDR</a>) vervangen. Tegenwoordig wordt vrij regelmatig VRAM onjuist aangeduid als het geheugen van een grafische kaart, onafhankelijk van de toegepaste geheugentechnologie. </p> <div class="mw-heading mw-heading2"><h2 id="Opbouw">Opbouw</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Video_random-access_memory&veaction=edit&section=1" title="Bewerk dit kopje: Opbouw" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Video_random-access_memory&action=edit&section=1" title="De broncode bewerken van de sectie: Opbouw"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Conceptueel bestaat VRAM uit twee delen: </p> <ul><li><b>SAM</b> (Serial access memory of <a href="/w/index.php?title=Sequential_access_memory&action=edit&redlink=1" class="new" title="Sequential access memory (de pagina bestaat niet)">Sequential access memory</a>)<br />De SAM-module wordt (gewoonlijk in vorm van een schuifregister) niet gewijzigd door berekeningen en bevat de van <a href="/wiki/RAMDAC" title="RAMDAC">RAMDAC</a> uit te lezen gegevens. Het wordt ingezet als sequentieel geheugen waarbij, in tegenstelling tot <a href="/wiki/Random_access_memory" class="mw-redirect" title="Random access memory">RAM</a>, gegevens slechts opeenvolgend worden geëvalueerd (net als een <a href="/wiki/Compact_cassette" class="mw-redirect" title="Compact cassette">cassette</a>). SAM is wezenlijk sneller uit te lezen dan RAM omdat in principe geen adresberekeningen noodzakelijk zijn.</li> <li><b>DRAM</b> (<a href="/wiki/Dynamic_random_access_memory" class="mw-redirect" title="Dynamic random access memory">Dynamic random access memory</a>)<br />Dit geheugentype wordt altijd gemanipuleerd door berekeningen aan de beeldsynthese. Op aanvraag worden de gegevens regelgewijs gekopieerd in SAM. Door de lokale scheiding is parallelle lees- en schrijftoegang mogelijk. Technologisch bestaat de DRAM-module uit FPM-RAM (cyclustijd 30-40 ns) of <a href="/w/index.php?title=Extended_Data_Output_Random_Access_Memory&action=edit&redlink=1" class="new" title="Extended Data Output Random Access Memory (de pagina bestaat niet)">EDO-RAM</a> (cyclustijd 20-30 ns) dat klokfrequenties van 50–66 MHz mogelijk maakt.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Doorontwikkelingen">Doorontwikkelingen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Video_random-access_memory&veaction=edit&section=2" title="Bewerk dit kopje: Doorontwikkelingen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Video_random-access_memory&action=edit&section=2" title="De broncode bewerken van de sectie: Doorontwikkelingen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><b>WRAM</b> (Window RAM)<br />WRAM is analoog aan VRAM met afzonderlijke lees- en schrijfleidingen maar biedt nochtans snellere toegangstijden en is goedkoper te produceren. De grafische kaarten MGA Millennium en Number Nine Revólution 3D "Ticket to Ride" van <a href="/wiki/Matrox" title="Matrox">Matrox</a> over WRAM.</li> <li><b>SGRAM</b> (Synchronous graphics RAM)<br /><a href="/wiki/SGRAM" class="mw-redirect" title="SGRAM">SGRAM</a> is een technologisch aan SDRAM verwant single-ported geheugen, wat inhoudt dat gelijktijdige lees- en schrijftoegang niet mogelijk is. Het biedt voor grafische toepassingen meer uitgebreide functies (bijvoorbeeld door het bloksgewijs lezen en schrijven) en hogere klokfrequenties.</li> <li><b>MDRAM</b> (Multi-bank DRAM)<br />MDRAM wordt als velden van onafhankelijke geheugenbanken opgebouwd, die onderling worden verbonden door een gemeenschappelijke bus. Met deze structuur is een hoge graad van parallellisatie mogelijk. De grafische kaart Hercules Dynamite 128 (GPU: TSENG ET6000) beschikt maximaal over 4 MB MDRAM.</li> <li><b>CDRAM</b> (Cache DRAM)<br />CDRAM is een combinatie van statisch geheugen (SRAM) en dynamisch geheugen (DRAM). Zo wordt het cachegeheugen van moderne computers bij CDRAM met veelvuldig gebruikte gegevens in het snelle SRAM opgeslagen, wat tot verhoogde prestaties (vanwege de snelheidswinst) leidt.</li> <li><b>3D-RAM</b><br />3D-RAM is door Mitsubishi ontwikkeld en bestaat uit geheugenmodules met daartussenin een <a href="/wiki/Ge%C3%AFntegreerde_schakeling" title="Geïntegreerde schakeling">geïntegreerde schakeling</a>. Hierdoor zijn sommige grafische verrichtingen (bijvoorbeeld een Z-buffer test) direct in het geheugen uitvoerbaar. Dit type geheugen wordt onder meer toegepast in de UltraSparc van Sun Microsystems.</li> <li><b>GDDR-SDRAM</b> (Graphics double data rate SDRAM)<br />GDDR-SDRAM is een op DDR-SDRAM gebaseerd geheugentype voor grafische toepassingen en wordt gekenmerkt door geoptimaliseerde toegangstijden en hoge kloksnelheden.</li></ul> <style data-mw-deduplicate="TemplateStyles:r67837862">.mw-parser-output .navigatie{position:relative;clear:both;overflow:auto;margin:1em auto -0.5em;padding:2px;background-color:var(--background-color-neutral-subtle,#f8f9fa);border:1px solid var(--border-color-base,#a2a9b1);text-align:center;font-size:87%}.mw-parser-output .navigatie-bewerken{margin-left:0.5em}.mw-parser-output .navigatie-bewerken .mw-ui-icon::before{background-size:0.9em}.mw-parser-output .navigatie-afb-links,.mw-parser-output .navigatie-afb-rechts{position:absolute}.mw-parser-output .navigatie-afb-rechts{right:2px}.mw-parser-output .navigatie-afb-groot{float:right;padding-left:0.5em}.mw-parser-output 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class="rechts"><a href="/wiki/Diskette" title="Diskette">diskette</a> · <a href="/wiki/Harde_schijf" title="Harde schijf">harde schijf</a> · <a href="/wiki/Redundant_array_of_independent_disks" title="Redundant array of independent disks">RAID</a> · <a href="/wiki/Direct-attached_storage" title="Direct-attached storage">DAS</a> · <a href="/wiki/Zipdisk" title="Zipdisk">zipdisk</a> · <a href="/wiki/Jaz" title="Jaz">Jaz</a> · <a href="/wiki/Minidisc" title="Minidisc">minidisc</a> · <a href="/wiki/SuperDisk" title="SuperDisk">SuperDisk</a></td></tr><tr><td class="links"><b>Optische schijven:</b></td><td class="rechts"><a href="/wiki/Compact_disc" title="Compact disc">compact disc</a> · <a href="/wiki/Dvd" title="Dvd">dvd</a> · <a href="/wiki/Blu-ray" title="Blu-ray">blu-ray</a> · <a href="/wiki/Hd-dvd" title="Hd-dvd">hd-dvd</a> · <a href="/wiki/China_Blue_High-Definition" title="China Blue High-Definition">CBHD</a> · <a href="/wiki/Enhanced_Versatile_Disc" title="Enhanced Versatile Disc">EVD</a> · <a href="/wiki/Holographic_Versatile_Disc" title="Holographic Versatile Disc">HVD</a> · <a href="/wiki/Universal_Media_Disc" title="Universal Media Disc">UMD</a> · <a href="/wiki/Versatile_Multilayer_Disc" title="Versatile Multilayer Disc">VMD</a></td></tr><tr><td class="links"><span class="nowrap"><b><a href="/wiki/Magneetband" title="Magneetband">Magnetische banden</a>:</b></span></td><td class="rechts"><a href="/wiki/Muziekcassette" title="Muziekcassette">compact cassette</a> · <a href="/wiki/Memorecorder" title="Memorecorder">Microcassette</a> · <a href="/wiki/Digital_audio_tape" title="Digital audio tape">Dat</a> · <a href="/wiki/Digital_compact_cassette" title="Digital compact cassette">Dcc</a> · <a href="/wiki/Digital_Video" title="Digital Video">Digital Video</a></td></tr><tr><td class="links"><b>Elektronisch:</b></td><td class="rechts"><a href="/wiki/Random-access_memory" title="Random-access memory">RAM</a> · <a href="/wiki/Registergeheugen" title="Registergeheugen">registergeheugen</a> · <a href="/wiki/Read-only_memory" title="Read-only memory">ROM</a> · <a href="/wiki/Spelcartridge" title="Spelcartridge">cartridge</a> · <a href="/wiki/Programmable_read-only_memory" title="Programmable read-only memory">PROM</a> · <a href="/wiki/Erasable_programmable_read-only_memory" title="Erasable programmable read-only memory">EPROM</a> · <a href="/wiki/Electrically_erasable_programmable_read-only_memory" title="Electrically erasable programmable read-only memory">EEPROM</a> · <a href="/wiki/Flashgeheugen" title="Flashgeheugen">flashgeheugen</a> · <a href="/wiki/Geheugenkaart" title="Geheugenkaart">geheugenkaart</a> · <a href="/wiki/Solid_state_drive" class="mw-redirect" title="Solid state drive">solid state drive</a> · <a href="/wiki/USB-stick" title="USB-stick">USB-stick</a> · <a href="/wiki/Disk_on_module" title="Disk on module">DOM</a> · <a href="/wiki/MRAM" title="MRAM">MRAM</a> · <a href="/wiki/PCRAM" title="PCRAM">PCRAM</a> · <a class="mw-selflink selflink">VRAM</a></td></tr><tr><td class="links"><b>Geponst papier:</b></td><td class="rechts"><a href="/wiki/Ponskaart" title="Ponskaart">ponskaart</a> · <a href="/wiki/Ponsband" title="Ponsband">ponsband</a></td></tr><tr><td class="links"><b>Overige:</b></td><td class="rechts"><a href="/wiki/Cache_(tijdelijk_geheugen)" title="Cache (tijdelijk geheugen)">cache</a> · <a href="/wiki/Network-attached_storage" title="Network-attached storage">NAS</a> · <a href="/wiki/Storage_area_network" title="Storage area network">SAN</a></td></tr></tbody></table> </div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Overgenomen van "<a dir="ltr" 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