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{"id":2308192,"date":"2020-07-15T19:41:58","date_gmt":"2020-07-15T17:41:58","guid":{"rendered":"https:\/\/www.phonandroid.com\/?p=2308192"},"modified":"2020-09-28T16:07:03","modified_gmt":"2020-09-28T14:07:03","slug":"la-ram-en-ddr5-promet-un-debit-de-48-gb-s-dans-les-pc-et-arrive-des-lannee-prochaine","status":"publish","type":"post","link":"https:\/\/www.phonandroid.com\/la-ram-en-ddr5-promet-un-debit-de-48-gb-s-dans-les-pc-et-arrive-des-lannee-prochaine.html","title":{"rendered":"La RAM en DDR5 promet un d\u00e9bit de 4,8 Gb\/s dans les PC, elle arrive d\u00e8s l’ann\u00e9e prochaine"},"content":{"rendered":"

Huit ans apr\u00e8s son officialisation, la DDR4 s\u2019appr\u00eate \u00e0 progressivement tirer sa r\u00e9v\u00e9rence. La prochaine g\u00e9n\u00e9ration de RAM, la DDR5, vient d\u2019\u00eatre officialis\u00e9e par l\u2019organisme en charge de la plupart des normes et standards en micro\u00e9lectronique, la JEDEC. La fen\u00eatre de lancement est pr\u00e9vue pour l\u2019horizon 2021.<\/strong><\/p>\n

\"RAM<\/strong><\/p>\n

La DDR5<\/strong> (JESD79-5) vient d\u2019\u00eatre officialis\u00e9e<\/strong> par le Joint Electron Device Engineering Council, ou le JEDEC pour les intimes, huit ans apr\u00e8s celle de la DDR4 (JESD79-4) et un peu plus d\u2019un an apr\u00e8s la LPDDR5<\/a>. Ce nouveau standard devait r\u00e9pondre aux exigences actuelles de l\u2019industrie, avec un d\u00e9bit (de lancement) annonc\u00e9 \u00e0 4,8 Gb\/s<\/strong>, contre 3,2 Gb\/s pour la DDR4 aujourd\u2019hui.<\/p>\n

Un document publi\u00e9 sur le site officiel du JEDEC<\/a> explique que ce d\u00e9bit a \u00e9t\u00e9 obtenu par le doublement du Burst Length <\/em>en BL16<\/strong>, passant ainsi de 8 \u00e0 16 bits. D\u2019autres am\u00e9liorations ont \u00e9galement \u00e9t\u00e9 cit\u00e9es. Chaque module de DDR5 poss\u00e9dera deux sous-canaux enti\u00e8rement ind\u00e9pendants de 40 bits<\/strong>, pour plus d\u2019efficacit\u00e9 et plus de fiabilit\u00e9 sur le long terme. Chaque die pourra en outre atteindre les 8 Go (contre 2 Go actuellement), avec une quantit\u00e9 maximale de 128 Go en UDIMM. Autre nouveaut\u00e9, la r\u00e9gulation de la tension, qui passe de 1,2 V \u00e0 1,1 V, sera \u00e9galement et d\u00e9sormais effectu\u00e9e par chaque barrette, et non plus par la carte-m\u00e8re. Cette baisse de tension en fonctionnement promet logiquement une meilleure efficacit\u00e9 \u00e9nerg\u00e9tique.<\/p>\n