32位操作係統的地址空間是2^32=4G。硬件（例如PCI-E顯卡）還要占用一些地址，所以實際可用地址小於4G。

來源: 加州老李於 2015-03-13 09:42:47 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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