[GTALUG] Not recognizing added RAM

Lennart Sorensen lsorense at csclub.uwaterloo.ca
Wed Oct 10 11:40:16 EDT 2018


On Wed, Oct 10, 2018 at 12:37:47AM -0400, Evan Leibovitch via talk wrote:
> Hi all,
> 
> I thought I would know how to handle this but it turns out that I don't.
> 
> I just added two new sticks of RAM to a system but it's not recognized by
> the BIOS or OS.
> 
> 
> # inxi -m
> Memory:    RAM: total: 7.74 GiB used: 2.93 GiB (37.9%)
>            Array-1: capacity: 16 GiB note: est. slots: 4 EC: None
>            Device-1: DIMM_A1 size: 4 GiB speed: 800 MT/s
>            Device-2: DIMM_A2 size: 4 GiB speed: 800 MT/s
>            Device-3: DIMM_B1 size: 4 GiB speed: 800 MT/s
>            Device-4: DIMM_B2 size: 4 GiB speed: 800 MT/s
> 
> So Inxi sees all 16GB (as does memtest) and yet in the first line it shows
> RAM total at 8. dmidecode output is below
> 
> Motherboard is an Asus F2A85-M. BIOS has been reset to defaults but not
> updated since the mobo was purchased.
> OS is current Manjaro KDE.
> 
> The website specs say it can take 64GB.
> Is updating the BIOS necessary or are there other solutions?
> 
> All help is greatly appreciated.

Check the setting for the UMA Frame Buffer Size in the BIOS.  Apparently
AMD's onboard video likes to take a LOT of memory by default if set
to auto.  Many people have seen the auto setting like to take 50% which
is of course insane.

See page 2-20 in the manual.

-- 
Len Sorensen


More information about the talk mailing list