Quote:
Originally Posted by Diablo
He has business 64, home 32 was thrown in with the CPU. That is the part that affects the RAM, not the version other than Basic. Home Premium supports more the ram its just the bit part that doesn't.
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Maybe I am not reading it right but it says for
64
"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."
32
"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."