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This article introduces the relevant knowledge of "how much memory does the computer XP system support?" in the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

How much memory does the computer XP system support?

How much memory is supported depends on the number of bits of the operating system. Depends on whether it is 32-bit or 64-bit. 32-bit and 64-bit hardware are incompatible. 32-bit XP systems only support 3.2 GB of physical memory, which is not recognized by the system. 64-bit systems can use up to 128 GB of physical memory and 16TB's virtual memory.

32-bit systems can support 3.25G (except windows2003), that is, if you have 4G memory, you can only display 3.25g of memory. 64-bit systems can support 128G (there is also a 64-bit version of XP, but generally 32-bit, and 64-bit XP is said to have no official Chinese version). However, windows7 and VISTA 32-bit systems can be modified to enable PAE support to 128G, which is the same as windows2003.

In theory, 32-bit = 2 ^ 32B = 4 * 2 ^ 30B = 4GB, so the 32-bit operating system happens to have access to the address in the 4GB range.

In practice, I have never seen any XP of 32bit that can access the physical memory of 4GB.

Theory and practice seem to be contradictory, but in fact they are not. Note that "can access the address of the 4GB range" does not mean "can support 4GB memory"!

Detailed analysis:

32-bit operating systems can access 4G space, but here 4G refers to addressing space, which does not simply correspond to memory. We often regard this space as memory size because memory is the main object of CPU addressing. In fact, operating system addressing includes addressing in memory bars, video card memory, sound card network cards, and other hardware interrupts, so 4GB is the sum of all the device addresses that the operating system can handle. That is, the memory space is only part of the addressing space.

The fundamental solution is to upgrade to a 64-bit operating system or use 2003 Enterprise Edition.

Many friends have a misunderstanding of computer memory, that is, they think that as long as they install the computer, the system will read how much memory, but in fact, whether it is XP, WIN7 read memory will have a limit, when we install more memory than the limited memory, the extra part is completely ineffective.

So how much memory can the XP system support? XP systems are divided into 32-bit systems and 64-bit systems, and the limit of memory read is also different. For example, XP32 systems can only read 3.25 gigabytes of memory. If you install 4G memory sticks, then the excess memory is completely useless. If your XP64 bit system, you can read 128G physical memory and 16TB virtual memory.

Therefore, if your computer memory bar installation is relatively large, then it is recommended that we install 64-bit operating system, can be fully used.

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