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  3. 學習啦>學習電腦>電腦入門>《內存雙通道是什么》正文

    內存雙通道是什么

    時間:2015-10-12 17:08:25本文內容及圖片來源于讀者投稿,如有侵權請聯系xuexila888@qq.com 廣達 我要投稿

      從理論指標來看,雙通道內存技術具有相當的優勢。雙通道DDR400的理論帶寬為6 4GB/s,和英特爾的前端總線為800MHz的P4處理器及i865、i875芯片組完全匹配。下面是學習啦小編為大家整理的技巧,希望大家能夠從中有所收獲!
     

      什么是內存雙通道?

      答:隨著高端處理器的推出,處理器對內存系統的帶寬要求越來越高,內存帶寬成為系統越來越大的瓶頸.內存廠商只要提高內存的運行頻率,就可以增加帶寬,但是由于受到晶體管本身的特性和制造技術的制約,內存頻率不可能無限制地提升,所以在全新蹬內存研發出來之前,雙通道內存技術就成了一種可以有效地提高內存帶寬的技術。它最大的優勢在于只要更改內存的控制方式,就可以在現有內存的基礎上帶來內存帶寬的提升。

    內存雙通道是什么

      從理論指標來看,雙通道內存技術具有相當的優勢。雙通道DDR400的理論帶寬為6 4GB/s,和英特爾的前端總線為800MHz的P4處理器及i865、i875芯片組完全匹配。前端總線為800MHz的P4平臺選用雙通道DDR400,與雙通道的內存控制和管理機制及高帶寬有很大關系。

      雙通道內存技術原理?

      答:雙通道內存技術其實就是雙通道內存控制技術,它能有效地提高內存總帶寬,從而適應新的微處理器的數據傳輸、處理的需要。雙通道DDR有兩個64bit內存控制器,雙64bit內存體系所提供的帶寬等同于一個128bit內存體系所提供的帶寬。

      雙通道體系包含了兩個獨立的、具備互補性的智能內存控制器,兩個內存控制器都能夠并行運作。例如,當控制器B準備進行下一次存取內存的時候,控制器A就在讀/寫主內存,反之亦然。兩個內存控制器的這種互補“天性”可以讓有效等待時間縮減50%,因此雙通道技術使內存的帶寬翻了一翻。它的技術核心在于:芯片組(北橋)可以在兩個不同的數據通道上分別尋址、讀取數據,RAM可以達到128bit的帶寬。

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