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Chapter 2
DVMT Mode
Unified Memory Architecture (UMA) is a concept whereby
system memory is shared by both CPU and graphics
processor. While this reduces cost, it also reduces the
system's performance by taking up a large portion of
memory for the graphics processor.
Intel's Dynamic Video Memory Technology (DVMT) takes
that concept further by allowing the system to dynamically
allocate memory resources according to the demands of
the system at any point in time. The key idea in DVMT is to
improve the efficiency of the memory allocated to either
system or graphics processor.
The BIOS feature that controls all this is the DVMT Mode
BIOS feature. It allows you to select the DVMT operating
mode.
When set to Fixed, the graphics driver will reserve a fixed
portion of the system memory as graphics memory. This
ensures that the graphics processor has a guaranteed
amount of graphics memory but the downside is once
allocated, this memory cannot be used by the operating
system even when it is not in use.
When set to DVMT, the graphics chip will dynamically
allocate system memory as graphics memory, according to
system and graphics requirements. The system memory is
allocated as graphics memory when graphics-intensive
applications are running but when the need for graphics
memory drops, the allocated graphics memory can be
released to the operating system for other uses.
When set to Both, the graphics driver will allocate a fixed
amount of memory as dedicated graphics memory, as well
as allow more system memory to be dynamically allocated
between the graphics processor and the operating system.
It is recommended that you set this BIOS feature to DVMT
for maximum performance. Setting it to DVMT ensures that
system memory is dynamically allocated for optimal
balance between graphics and system performance.
Fixed, DVMT,
Both
Parameter
Description
Options