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                **雙倍數據率同步動態隨機存取存儲器**(英語:**Double Data Rate Synchronous Dynamic Random Access Memory**,簡稱**DDR SDRAM**)為具有雙倍數據傳輸率的[SDRAM],其數據傳輸速度為系統[時鐘頻率]的兩倍,由于速度增加,其傳輸性能優于傳統的SDRAM。 DDR SDRAM 在系統時鐘的上升沿和下降沿都可以進行數據傳輸。 為DDR存儲器設立速度規范,并分為以下兩個部分:按內存芯片分類和按內存模塊分類。
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