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  "contentMarkdown": "# 32位的CPU下，程序使用的空间能不能超过4GB呢？\n\n> [!note] 我的 UWA 问答\n> 本文收录我在 UWA 问答发表的公开回答。问题内容归原提问者；回答保留当时语境，技术结论可能受 Unity 版本、平台和项目条件限制。\n\n## 问题\n\n![image.png](assets/611dfe458f8c83424176301b/01.png)\n\n既然有的CPU可以有36条地址总线，那为啥对于虚拟空间，它的寻址能力还是4GB呢 而且寻址能力不是和地址总线有关吗 还有红框的这句话该如何理解呢？为啥只能使用32位指针？\n\n- 提问者：掏粪男孩\n- 提问时间：2021-08-19 22:46:29\n\n## 我的回答\n\n可以参考我的这篇回答：[32位进程最多能分配1.5GB？](https://answer.uwa4d.com/question/60d8817ae58b4719dd3e27f7#60d8b01ce58b4719dd3e27f9)\n\nhttps://answer.uwa4d.com/question/60d8817ae58b4719dd3e27f7#60d8b01ce58b4719dd3e27f9\n\n32位指针，就是地址线有32条，就是只能用32位二进制（01）来表示地址，能表示的地址有 2^32=4x1024x1024 = 4G，而一个地址存放一个字节(Byte)，所以这个地址空间能存放 4G Byte 就是4GB\n\n- 回答时间：2021-08-20 18:29:14\n- 最后更新：2021-08-20 18:33:16\n- 采纳状态：未采纳\n\n## 来源与关系\n\n- 上位集合：[[10-计算机、信息技术与工程/05-游戏图形与运行时/我的UWA问答/我的UWA问答|我的 UWA 问答]]\n- UWA 标签：终端平台\n- 原始问题：[32位的CPU下，程序使用的空间能不能超过4GB呢？](https://answer.uwa4d.com/question/611dfe458f8c83424176301b)\n- 源页最后更新：2021-08-20 18:29:14\n"
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