Warning: Use of undefined constant title - assumed 'title' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 152 ddr2和ddr3的区别,详细教您如何区分DDR2 DDR3内存条
- 分类:win8 发布时间: Warning: Use of undefined constant newstime - assumed 'newstime' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 156 2018年03月30日 10:00:02
内存是CPU、硬盘以及程序运行时候的临时存储空间,是非常重要的电脑部件,我们的科技在飞速地发展,如今电脑的内存条已发展到第三代了。那么,这ddr2和ddr3型号的内存条有什么区别呢?下面,小编就来跟大家讲解如何区分DDR2 DDR3内存条。
内存条是CPU可通过总线寻址,并进行读写操作的电脑部件。内存条在电脑历史上曾经是主内存的扩展。也是电脑储存文件数据的重要条件了,不过貌似有不少的用户对区分DDR2 DDR3内存条不是很了解,下面,小编就来跟大家分享ddr2和ddr3的区别。
如何区分DDR2 DDR3内存条
DDR2与DDR3内存的特性区别:
1、逻辑Bank数量
DDR2 SDRAM中有4Bank和8Bank的设计,目的就是为了应对未来大容量芯片的需求。而DDR3很可能将从2Gb容量起步,因此起始的逻辑Bank就是8个,另外还为未来的16个逻辑Bank做好了准备。
DDR2电脑图解-1
2、封装(Packages)
由于DDR3新增了一些功能,在引脚方面会有所增加,8bit芯片采用78球FBGA封装,16bit芯片采用96球FBGA封装,而DDR2则有60/68/84球FBGA封装三种规格。并且DDR3必须是绿色封装,不能含有任何有害物质。
电脑内存条电脑图解-2
3、突发长度(BL,Burst Length)
由于DDR3的预取为8bit,所以突发传输周期(BL,Burst Length)也固定为8,而对于DDR2和早期的DDR架构的系统,BL=4也是常用的,DDR3为此增加了一个4-bit Burst Chop(突发突变)模式,即由一个BL=4的读取操作加上一个BL=4的写入操作来合成一个BL=8的数据突发传输,届时可通过A12地址线来控制这一突发模式。
DDR3电脑图解-3
4、寻址时序(Timing)
就像DDR2从DDR转变而来后延迟周期数增加一样,DDR3的CL周期也将比DDR2有所提高。DDR2的CL范围一般在2至5之间,而DDR3则在5至11之间,且附加延迟(AL)的设计也有所变化。DDR2时AL的范围是0至4,而DDR3时AL有三种选项,分别是0、CL-1和CL-2。另外,DDR3还新增加了一个时序参数——写入延迟(CWD),这一参数将根据具体的工作频率而定。
内存条电脑图解-4
ddr2,3代内存的外观区别
DDR2:
一个缺口、单面120针脚、双面240针脚、左64右56、内存颗粒正方形、电压1.8V。
内存条电脑图解-5
DDR3:
一个缺口、单面120针脚、双面240针脚、左72右48、内存颗粒正方形、电压1.5V。
其工作电压一直在降低,因此在性能提升的同时,功耗也在逐渐变小。
电脑内存条电脑图解-6
以上就是ddr2和ddr3的区别了。
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