I've attached the dxdiag report. I only found two settings that felt relevant in the BIOS: preallocated DVMT = 32m, max TOLUD = dynamic. I didn't find a shared memory setting, or at least it wasn't labelled as such.
DxDiag-rallymen007.txt.zip 17.0 K
Thank you for the information and the BIOS pre-allocated DVMT = 32m, max TOLUD = dynamic.
And Intel and manufacturer assigns 4GB for possible use on the video graphics.
Another option will be on this link http://www.intel.com/support/graphics/sb/CS-029090.htm
Which will let you know what is the max memory that the video chipset will be able to use from the onboard RAM.