The amount of video memory is dependent upon the amount of pre-allocated video memory plus DVMT allocation. DVMT, as its name implies, dynamically allocates system memory for use as video memory to ensure more available resources for 2D/3D graphics performance, e.g. for graphically demanding games.
"DVMT review". Intel Corporation. Archived from the original on 2012-06-21. https://web.archive.org/web/20120621001339/http://www.intel.com/support/graphics/sb/CS-010488.htm ↩