32位计算机可以访问多少内存？ [英] how much memory can be accessed by a 32 bit machine?

问题描述

32位或64位计算机是什么意思？

What is meant by 32bit or 64 bit machine?

这是处理器体系结构…32位计算机可以与64位计算机同时读写32位数据位计算机…。

It’s the processor architecture…a 32 bit machine can read and write 32bit data at a time same way with 64 bit machine….

32位计算机可以访问的最大内存是多少？

whats the maximum memory that a 32 bit machine can access?

它是 2 ^ 32 = 4Gb （4Gigabit = 0.5 GigaByte）

It is 2^32=4Gb (4Gigabit = 0.5 GigaByte)

这意味着4Gb ram吗？

That means 4Gb ram?

如果我对64位计算机考虑相同的方式，那么我可以拥有16ExbiBytes的内存..这可能吗？

If I consider the same way for a 64 bit machine then I can have a ram of 16ExbiBytes ..is that possible?

我的概念是是吗？

推荐答案

是的，一个32位体系结构被限制为最多可处理4 GB的内存。视操作系统而定，由于保留了地址空间，该数字甚至可以进一步减少。

Yes, a 32-bit architecture is limited to addressing a maximum of 4 gigabytes of memory. Depending on the operating system, this number can be cut down even further due to reserved address space.

在某些32位体系结构上，可以通过使用以下限制来消除此限制： PAE（物理地址扩展名），但是处理器必须支持它。 PAE使处理器能够访问超过4 GB的内存，但不会更改单个进程可用的虚拟地址空间量-每个进程仍将限制为最大4 GB的地址空间。

This limitation can be removed on certain 32-bit architectures via the use of PAE (Physical Address Extension), but it must be supported by the processor. PAE eanbles the processor to access more than 4 GB of memory, but it does not change the amount of virtual address space available to a single process—each process would still be limited to a maximum of 4 GB of address space.

是的，从理论上讲，64位体系结构可以处理1680万兆兆字节的内存，即2 ^ 64字节。但是我不相信当前流行的实现完全支持这一点。例如，AMD64架构最多只能寻址1 TB的内存。此外，您的操作系统还将对受支持的可寻址内存量进行限制。 Windows的许多版本（尤其是供家庭或其他非服务器使用的版本）受到任意限制。

And yes, theoretically a 64-bit architecture can address 16.8 million terabytes of memory, or 2^64 bytes. But I don't believe the current popular implementations fully support this; for example, the AMD64 architecture can only address up to 1 terabyte of memory. Additionally, your operating system will also place limitations on the amount of supported, addressable memory. Many versions of Windows (particularly versions designed for home or other non-server use) are arbitrarily limited.

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