{"meta":{"id":"https:\/\/api.iclient.ifeng.com\/ipadtestdoc?aid=ucms_7y9GD7RfyHw","type":"doc","o":"1","documentId":"ucms_7y9GD7RfyHw"},"body":{"newStatus":"1","documentId":"ucms_7y9GD7RfyHw","staticId":"ucms_7y9GD7RfyHw","title":"DDR5 SDRAM规范正式公布:4800MHz起跳,带宽提升一倍","shareTitle":"DDR5 SDRAM规范正式公布:4800MHz起跳,带宽提升一倍","thumbnail":"http:\/\/d.ifengimg.com\/w150_h106_q100\/x0.ifengimg.com\/ucms\/2020_29\/1437F01CCBC3A834251E6E5033D8FBACC752510A_w698_h392.jpg","source":"ITheat","author":"","editorcode":"weMedia","editTime":"2020-07-16 10:00:21","updateTime":"2020\/07\/16 10:00:21","wapurl":"http:\/\/\/\/feng.ifeng.com\/c\/7y9GD7RfyHw","introduction":"","wwwurl":"http:\/\/\/\/feng.ifeng.com\/c\/7y9GD7RfyHw","commentsUrl":"ucms_7y9GD7RfyHw","commentCount":0,"text":"
早在2018年,JEDEC固态技术协会就计划发布DDR5 SDRAM最终规范,不过DDDR5规范的正式版直到最近才正式公布。相比初代DDR4,全新DDR5内存标准将峰值内存速度提高了一倍,同时大大增加内存容量。<\/p>
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据JEDEC固态存储协会发布的DDR5 SDRAM标准(JESD79-5),DDR5内存芯片的Bank物理存储体数量翻番到32,每Bank的自刷新速度翻番到16Gbps,最大UDIMM容量为128GB。VDD电压从DDR4的1.2V降至1.1V,进一步降低了功耗。<\/p>
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而对应的内存频率将从4.8Gbps(4800MHz)起跳,比末代DDR4的标准频率3200MHz增加了50%之多,相比初代DDR4 2400MHz频率更是直接翻倍,总传输带宽提升了100%,而在未来,DDR 5内存将最高将支持到8400MHz左右。<\/p>
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由于DDR5采用双通道设计,相应的引脚布局也发生改变,而对应针脚走线也发生相应变换,因此主板的内存插口也要根据DDR5内存引脚做出对应修改,通过下一代。据悉,DDR5内存将率先应用于服务器,随后也会逐步推广到消费级PC等设备中。<\/p>","img":[{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/x0.ifengimg.com\/res\/2020\/245344F52B8358D689B697C8CC46FA6195739054_size222_w750_h500.jpeg","size":{"width":"640","height":"426"}},{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/x0.ifengimg.com\/res\/2020\/D0583A985DADB4C3FAEDD724648861D32D52A00E_size165_w750_h410.jpeg","size":{"width":"640","height":"349"}},{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/x0.ifengimg.com\/res\/2020\/E5DF0C72E5E4C550B1ADD2AE9A1C70679AFAF73F_size145_w750_h457.jpeg","size":{"width":"640","height":"389"}}],"summary":"早在2018年,JEDEC固态技术协会就计划发布DDR5SDRAM最终规范,不过DDDR5规范的正式版直到最近才正式公布。相比初代DDR4,全新DDR5内存标准","sharesummary":"早在2018年,JEDEC固态技术协会就计划发布DDR5SDRAM最终规范,不过DDDR5规范的正式版直到最近才正式公布。相比初代DDR4,全新DDR5内存标准","commentType":"0","wemediaEAccountId":"885788","showclient":"0","shareurl":"https:\/\/ishare.ifeng.com\/c\/s\/v002vVHsMRvVcvxlAkgDyJV4QiMdElbPk0fKwnTapl3pHBI__","praise":"0","like_num":"0"}}