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基于 Windows 7 的计算机的可用内存可能低于安装内存 - Microsoft 支持
在运行 Windows 7 的计算机上，可用内存 (RAM) 大小可能会低于已装内存大小。. 例如，32 位版本的 Windows 7 可能会报告，计算机上安装了 4 GB 内存，但可用系统内存只有 3.5 GB。. 或者，64 位版本的 Windows 7 可能会报告，计算机上安装了 8 GB 内存，但可用系统内存只有 ...
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