Ram五, 08/11/2019 - 22:27 的修訂版本

修訂版本可以讓你追蹤文章的多個版本的不同之處。

 

 

 


Singe Rank Memory

 

外觀

It can be memory with chips on only one side of the stick of memory,(多數)

however Single Rank Memory can also have chips on both sides of the Stick as well.

Hardware

Channel -> DIMM(Dual In-line Memory Module) -> Rank -> Chip -> Row/Col

DIMM 頻寬: 64bit

記憶體顆粒寬: 8 bit => 1 Rank = 8 Chip (8x8 bit)

Label

Single Rank has a 1RxN on it, for example 1Rx4 or 1Rx8,

On the flip side Dual Rank Memory has a 2RxN on it, for example 2Rx4 or 2Rx8.

2R = 2 個 Rank

x8 =每個 Rank 有8顆IC

原理

每個 Rank 以相同的 Chip Select(CS# (CS0, CS1)) 連接在一起

也就是說當北橋發出 CS# 訊號時, 這個Rank內的所有IC顆粒便同時會被 Enable

(Only one rank is accessible at a time)

 


電壓

 

DDR3 分為 1.5V 與 1.35V (DDR3L) 兩個版本

 


Quad-rank