窗口景色32位和64位(x86和x64)最大值支持RAM物理內存極限

窗口景色 顯然是多數資源飢餓和記憶用法廣泛 操作系統 可利用迄今，和由顯示了 高端系統規範 特別是如果您打算使能所有，那需要適當地和高效率地跑窗口景色 先進的窗口景色特點 在a 窗口景色優質準備好個人計算機. 跑窗口的單程景色快速地是增加和安裝許多記憶或RAM儘可能到您的桌面或便攜式計算機。 然而，不要買存儲芯片，和您能平衡您的系統可以支持它一樣多，或者您有許多金錢饒恕，儘管有上限在物理內存和虛擬內存窗口景色可能支持和認可的地址空間。

窗口景色支持由4GB RAM虛擬內存地址範圍決定為32位窗口景色的多數編輯除窗口景色起始者編輯之外和由物理內存決定128GB為64位窗口景色的多數編輯除了窗口景色在家基本和在家保險費。 窗口景色起始者編輯不是可利用的在64位或x64版本。

窗口景色極限在最大物理和虛擬內存地址

最大值支持的物理內存在窗口景色不将與窗口景色可能使用的虛擬內存地址混淆。 雖然窗口景色32位操作系統的平臺發行可能可能理論上和技術上使用，并且通過使用PAE (物理地址引伸)訪問記憶支持更多比物理內存或RAM 4GB由mainboard remapped或主板在4GB地址界限之上，然而，窗口景色的x86版本不由對4GB完全安裝的RAM的設計支持充分的用途，因為景色的所有32bit編輯是設計在限制的PAE-Kernal到4GB虛擬內存地址空間，以景色對1GB的起始者極限。

Since only a maximum of 4GB virtual memory address range is available in Windows Vista, which are sub-divided or allocated some memory address range to manage both the computer’s PCI memory address range (also known as MMIO) which used for system video graphics cards, BIOS, IO cards, networking, PCI hubs, bus bridges, PCI-Express, and RAM, so the amount of available RAM is always less than 4 GB. BIOS takes up about 512 KB, with video or graphic accelerator card needs memory address for at least the amount of memory on the graphics card. Which mean if you have 256 MB VRAM graphic card, at least 256 MB already been used up from your 4 GB memory available to Windows Vista. The net result is that a high performance x86-based computer may allocate 512 MB to more than 1 GB for the PCI memory address range before any RAM (physical user memory) addresses are allocated. So the typical available RAM for the OS will be reduced to between 3 GB and 3.4 GB.

So if you want to fully utilize your physical memory of 4 GB or more in Windows Vista, the only way is to install 64-bit Windows Vista operating system which uses 64-bit addressing enabling virtually the entire amount of installed RAM to be made available on computers that have large address infrastructures (where the entire system has more than 4 GB addressing capabilities via the processor, chipset, physical memory capacity, etc), by moving the virtual memory address range needed by the system PCI, I/O and RAM out of the 4GB address space.

Note that also on 32-bit editions of Windows, applications have 4 gigabyte (GB) of virtual address space available. The virtual address space is divided so that 2-GB is available to the application and the other 2-GB is available only to the system. So if your Vista system unable to use more than 2GB of memory even though 4GB has been installed, try to use 4GT RAM Tuning feature increases the memory that is available to the application up to 3-GB, and reduces the amount available to the system to between 1 and 2-GB, by adding the /3GB switch to the Boot.ini file.

IMPORTANT: This is a machine translated page which is provided "as is" without warranty. Machine translation may be difficult to understand. Please refer to original English article whenever possible.

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This entry was posted on Sunday, January 14th, 2007 at 6:09 pm and is filed under Windows Vista. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.