"Netty" <netty@xxxxxx> wrote in message
news:e2$14sQuIHA.2068@xxxxxx
Quote:
>
> "Ian D" <taurus@xxxxxx> wrote in message
> news:ubm6pMQuIHA.5580@xxxxxx Quote:
>>
>> "Newton" <Newton@xxxxxx> wrote in message
>> news:05E3639B-00D1-4C7F-81A6-F4B8C8319960@xxxxxx Quote:
>>> Hi,
>>>
>>> I just installed an additional 2gb of RAM on my system, but this is not
>>> showing in the Task Manager. It iniitally was not showing in either, but
>>> after installing SP1 Sys info was updated. Please help.
>>>
>>> 680i SLI Mobo
>>> 2 X 8800GT 512mb
>>> Quad Core Q6600
>>> Vista 32bit
>>> 4gb - OCZ Sli ready RAM - 1066mhz (DDR2)
>>
>> Is memory remapping enabled in the BIOS? If so, disable it. Memory
>> remapping is only for 64 bit OSs, to move the hardware addressing
>> to above the highest physical memory. I have found that enabling
>> memory remapping for XP or Vista 32 drops the useable (Task
>> Manager reported) memory to 2GB.
>> >
> But doesn't Vista 32bit only use a max of 3GB of RAM anyway?
>
> Netty Vista 32 bit and XP 32 bit have access to 4 GB of virtual address
space. Of that, 500 MB to about 900 MB is reserved for hardware
addressing. The biggest user is PCIe video cards, as the video RAM
is mapped into the addressing space. What's left, usually 3.1 - 3.5 GB,
is available to Windows. Each running application has its own 4 GB
of virtual addressing space subject to the above limitation, and the
virtual addresses are mapped into available physical RAM as required.
This allows concurrently running applications to use the same memory
space addresses, but different physical RAM addresses.