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Subject: Re: [gentoo-user] hardware - memory problem
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On 16/12/2020 22:34, Mark Knecht wrote:
> 
> 
> On Wed, Dec 16, 2020 at 3:29 PM Mark Knecht <markknecht@gmail.com 
> <mailto:markknecht@gmail.com>> wrote:
>  >
>  >
>  >
>  > On Wed, Dec 16, 2020 at 3:22 PM <thelma@sys-concept.com 
> <mailto:thelma@sys-concept.com>> wrote:
>  >>
>  >> I run Memtest86 on my old box and it completed 1pass without any errors.
>  >> Memtest86 reports 16G memory
>  >>
>  >> When I boot Gentoo it shows only 3282Mb
>  >> free -m
>  >>               total        used        free      shared  buff/cache
>  >> available
>  >> Mem:           3282         125        2475           7         680
>  >>   3033
>  >>
>  >> Is it a motherboard? How to test it?
>  >>
>  >
>  > Start with
>  >
>  > cat /proc/meminfo
> 
> 
> Or lshw and look for the DIMM modules themselves

Or is this a 32-bit system WITHOUT extended memory support?

I don't properly understand it, but with a 32-bit system the kernel uses 
1GB of memory and user-space uses the other 3GB. Extended memory support 
means each process can have its own 3GB space which enables you to use 
all available memory, but without it I think the entire system is stuck 
in the first 4GB.

Cheers,
Wol