本帖最后由 gotomsdos 于 2021-7-21 09:49 编辑
我在楼上那一贴已经解决了苹果和AIDA64的BANK/DIMM概念的使用,下面再说一个也是与内存直接相关的BANK的另外一意思:使问题复杂化、更扑朔迷离啦哈哈  据如下资料说,“bank”,有两个意思。一指“rank”,二指“内存颗粒所具有的位宽(bit)”,就是内存条上标签里的8GB 1Rx8,2Rx8或1Rx16等其中的x8,x16的概念,哈哈。 The term rank was created by JEDEC, the memory industry’s standards group, to distinguish between 【the number of memory banks on a module 内存条的颗粒排数(后来以rank表示)】 as opposed to 【the number of memory banks on a component, or memory chip 内存颗粒所具有的位宽数】. The concept of memory rank applies to all memory module form factors, though in general it tends to matter primarily on server platforms, due to the larger amounts of memory they manage. A memory rank is a block or area of data that is created using some, or all, of the memory chips on a module. A rank is a data block that is 【64 bits 总共64位位宽】 wide. On systems that support Error Correction Code (ECC) an additional 8 bits are added, which makes the data block 72 bits wide. Depending on how a memory module is engineered, it may have one, two, or four blocks of 64-bit wide data areas (or 72-bit wide in the case of ECC modules.) This is referred to as single-rank, dual-rank, and quad-rank. Crucial denotes this on the module label as 1Rx4, or 2Rx4, 2Rx8, or similar. The x4 and x8 refer to 【the number of banks on the memory component or chip (翻译为:内存颗粒的位宽数)。赶脚这句话有问题,应该搞错了。x4 and x8是指位宽(device width)。number of banks另有含义,这两者是不同的概念,同时存在,不应该混淆。见图 】. It is this number, not the number of individual memory chips on a PCB, that determines the rank of the finished module. 资料来源: https://www.crucial.com/support/articles-faq-memory/what-is-a-memory-rank
【总结】 有关内存的bank,就有四个意思: 一,插槽 通常与作为“内存通道”意义的Dimm连用 二,内存条的颗粒排数 此义项已很少用,通常以rank来表示 三,库 数据存储的一个单位,在颗粒(chip)之下。一般来说,8GB或16GB的单个颗粒具有16个bank或8个bank(内存总容量和单个颗粒所含bank数没有对应关系)。库与容量有关。
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