Only half of RAM detected on MSI P55-GD65

[david-8uUts6sDVDvs2Lz0fTdYFQ at public.gmane.org (David Kramer)]

On 11/21/2010 02:35 PM, Rich Braun wrote:
> An update to the newest BIOS release (1.10) does fix the bizarre power-cycling
> issue.  But the RAM issue remains.  (BIOS splash-screen and other menus report
> all the RAM I installed, but Linux uses only half the available amount,
> whether I install 2 modules or 4; there is a lot of chatter online about
> "reserved memory", a BIOS feature called "memory remapping" which is not
> selectable in the MSI BIOS, bent CPU socket pins, and on and on...)

Is it possible you're using one of those video cards that steals main
RAM instead of having its own?