(3):Active to Precharge Delay [8] 意思是
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(3):Active to Precharge Delay [8] 意思是
Min RAS# Active Timing(tRAS)
可选的设置:Auto,00,01,02,03,04,05,06,07,08,09,10,11,12,13,14,15.
该值就是该值就是“3-4-4-8”内存时序参数中的最后一个参数,即8.Min RAS# Active Time (也被描述为:tRAS、Active to Precharge Delay、Row Active Time、Precharge Wait State、Row Active Delay、Row Precharge Delay、RAS Active Time),表示“内存行有效至预充电的最短周期”,调整这个参数需要结合具体情况而定,一般我们最好设在5-10之间.这个参数要根据实际情况而定,并不是说越大或越小就越好.
如果tRAS的周期太长,系统会因为无谓的等待而降低性能.降低tRAS周期,则会导致已被激活的行地址会更早的进入非激活状态.如果tRAS的周期太短,则可能因缺乏足够的时间而无法完成数据的突发传输,这样会引发丢失数据或损坏数据.该值一般设定为CAS latency + tRCD + 2个时钟周期.如果你的CAS latency的值为2,tRCD的值为3,则最佳的tRAS值应该设置为7个时钟周期.为提高系统性能,应尽可能降低tRAS的值,但如果发生内存错误或系统死机,则应该增大tRAS的值.
如果使用DFI的主板,则tRAS值建议使用00,或者5-10之间的值
(3):Active to Precharge Delay [8] 意思是
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