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#1 trevorcork

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Posted 23 June 2016 - 03:16 AM

Just a quick question, does a 32BIT OS only see 2GB of ram as in if you had a 32bit OS and had 6GB ram it wouldnt see iot so it would be nullk and void?


Edited by hamluis, 23 June 2016 - 06:00 AM.
Moved from Win 7 to Internal Hardware - Hamluis.


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#2 Platypus

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Posted 23 June 2016 - 03:44 AM

A 32 bit OS can utilize what is left of the 4GB 32 bit address space once memory reserved for hardware is subtracted, and this varies between systems. Many systems have over 3GB available to the OS if 4GB or more is fitted. But there would be no difference whether there was 4GB or 6GB in the system for a 32 bit OS.

 

Some OSs such as Windows 7 Starter Edition were artificially limited to accessing 2GB of RAM.


Edited by Platypus, 23 June 2016 - 03:46 AM.

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#3 FreeBooter

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Posted 23 June 2016 - 03:52 AM

The major difference between 32-bit and 64-bit Windows is memory support—specifically, breaking the 4GB barrier found in 32-bit Windows systems. 32-bit versions of Windows support up to 4GB of physical memory, with up to 2GB of dedicated memory per process. 64-bit versions of Windows support up to 512GB of physical memory, with up to 4GB for each 32-bit process and up to 8TB for each 64-bit process. Support for more memory means applications can preload more data into memory, which the processor can access much more quickly. Although 32-bit versions of Windows can support up to 4GB of RAM, applications cannot access more than about 3.25GB of RAM. The remainder of the address space is used by video cards, the system ROM, integrated PCI devices, PCI and PCIe cards, and APICs.

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